All MCQs in the chapter 2 (Electricity, Magnetism and semiconductors) are given:
Topics Covered:
- Electric field, potential, and potential difference.
- Magnetic intensity and flux
- Laws of series and parallel combination
- Conductor, semi-conductor and insulators
1. There are _______ types of electric charge.
A] 4
B] 2
C] 3
D] 5
2. The substance receiving electrons becomes _______ charged.
A] Negatively
B] Positively
C] Neutral
D] None of thesse
3. The substance which losses electrons becomes _______ charged.
A] Negatively
B] Neutral
C] Positively
D] None of thesse
4. Charge is measured in _______
A] Candela
B] Negative
C] Positive
D] Coulomb
5. The force of attraction or repulsion between two charge and these charges are separated by distance is ________
A] Ohm’s law
B] Coulomb’s Inverse Square Law
C] Law of parallel combination
D] Newton's third law of motion
6. A charged body placed near a charge will experience a force. The region in which a charge experiences a force is called ________
A] Magnetic field
B] Magnetism
C] Electric field
D] Magnetic field intensity
7. Electric Intensity is measured in ______
A] N/C
B] Wb
C] EI
D] A-m
8. A charged sphere of 60 micro coulomb is placed in air. Find the electric field intensity at a point 30cm from the center of sphere
A] 6 X 10-6 N/C
B] 6 X 109 N/C
C] 6 X 106 N/C
D] 9 X 106 N/C
9. What is the S.I. unit of potential ?
A] joule/ coulomb
B] ampere
C] joule × coulomb
D] mole
10. Calculate the potential at point 10 cm away from a charge of 300 𝜇𝑐, in air
A] 26 x 10-4 v
B] 27 x 10-4 v
C] 25 x 104 v
D] 27 x 104 v
11. _______ is defined as the property by virtue of which a magnetic material is able to create an attraction or repulsion force.
A] Magnetic field intensity
B] Magnetic field
C] Magnetism
D] Magnetic lines of force
12. Every substance is made up of tiny units called _____
A] Proton
B] Atoms
C] Neutron
D] None of these
13. A _______ can be produced by either movement of charge or a magnetized material.
A] Magnetic field
B] Magnetic field intensity
C] Electric potential
D] None of these
14. Magnetic field is denoted as _____
A] MF
B] M
C] F
D] B
15. What is the S.I. unit of magnetic field ?
A] joule
B] tesla(T)
C] coulomb
D] gauss
16. Which statement is wrong about magnetic lines of force ?
A] They never intersect each other.
B] The magnetic field is tangent to the magnetic lines of force.
C] All the lines of force have same strength.
D] None of these
17. _______ is the number of magnetic field lines passing through a closed loop surface.
A] Magnetic field
B] Magnetic field intensity
C] Magnetic Flux
D] Magnetic lines of force
18. The amount of magnetic lines of forces set up in magnetic circuit is called _____
A] Magnetic field
B] Magnetic field intensity
C] Magnetic Flux
D] Magnetic lines of force
19. What is the S.I. unit of magnetic flux ?
A] weber(wb)
B] tesla(T)
C] coulomb
D] gauss
20. The direction of magnetic field within a magnet is from ______ Pole to ______ Pole.
A] South, East
B] North, South
C] South, North
D] South, West
21. Current =
A] Time x Charge
B] Charge x Time
C] Time / Charge
D] Charge / Time
22. According to ________, the current flowing through the conductor is directly proportional to potential difference applied across its ends, provided physical state of the conductor ( material, length, cross-sectional area, temperature) remains same.
A] Law of parallel combination
B] Ohm’ law
C] Coulomb’s Inverse Square Law
D] Newton's third law of motion
23. If, ‘I’ is current flowing through the conductor and ‘V’ is the potential difference across the conductor then,
A] I/V
B] V x I
C] V/I
D] V 𝛼 I
24. When temperature & nature of material of conductor remain same, the resistance of a conductor depends on :
A] Length :- It is observed that resistance of the conductor is directly proportional to its length. R 𝛼 L
B] Area of cross-section:- the resistance of the conductor is inversely proportional to its cross-sectional area
C] Both A] & B]
D] None of these
25. The unit of conductance is ______
A] mho (Ʊ)
B] C
C] Wb
D] None of these
26. The effective resistance offered by two or more resistors connected in series combination is the algebraic sum of resistances of the individual resistors. This ststement is belongs to which law ?
A] Ohm’s law
B] Law of parallel combination of resistance
C] Law of resistance in series combination
D] None of these
27. ______ states that the reciprocal of effective resistance offered by two or more resistors connected in parallel combination is equal to the algebraic sum of the reciprocals of the resistances of individual resistors.
A] Ohm’s law
B] Law of parallel combination of resistance
C] Law of resistance in series combination
D] None of these
28. The heating effect of an electric current depends on _____
A] The resistance, R of the conductor. A higher resistance produces more heat.
B] The time, t for which current flows. The longer the time the larger the amount of heat produced.
C] The amount of current, I. the higher the current the larger the amount of heat generated.
D] All of these
29. When current flows through a conductor, the heat produced in a conductor is directly proportional to the product of square of current (I2), resistance of the conductor (R) and the time (t) for which current is passed. This ststement is belongs to which law ?
A] Ohm’s law
B] Law of parallel combination of resistance
C] Joule’s law
D] Law of resistance in series combination
30. An electrical bulb is labeled 100W, 240V. Calculate:
1. The current through the filament when the bulb works normally
2. The resistance of the filament used in the bulb.
A] I = 0.4167 A & R = 576.04 Ω
B] I = 0.1847 A & R = 436.45 Ω
C] I = 576.04 A & R = 0.4167 Ω
D] I = 0.4155 A & R = 586.74 Ω
31. The material which allow electric current to flow through them easily are called _______
A] Conductor
B] Semiconductor
C] Insulator
D] All of these
32. Which of the following is the is a good conductor of electricity ?
A] Copper
B] Gold
C] Silver
D] All of these
33. The material which does not allow electric current to flow through them easily are called _______
A] Conductor
B] Semiconductor
C] Insulator
D] All of these
34. The material which has conductivity in between metal & insulator is called _______
A] Conductor
B] Semiconductor
C] Insulator
D] All of these
35. Semiconductor are insulators at ______ temperature and act as conductors at ______ temperature.
A] Low, High
B] High, High
C] High, Low
D] Low, Low
36. ________ is the kinetic energy gained by an electron when accelerated trough potential difference of one volt.
A] One valance electron
B] Valance electron
C] One electron volt
D] None of these
37. The band formed by the series of energy levels containing the valance electrons is known as _______
A] Valance band
B] Valance electron
C] Conduction band
D] None of these
38. The conduction band may also be defined as the _______
A] Highest unfilled energy band
B] Lowest filled energy band
C] Valance band
D] Lowest unfilled energy band
39. Identify the types of semiconductor.
A] Extrinsic Semiconductor
B] Intrinsic Semiconductor
C] Both A] & B]
D] None of these
40. The conductivity of semiconductor is increased by adding a small amount of suitable impurity to pure semiconductor such materials are known as _______
A] Extrinsic Semiconductor
B] Intrinsic Semiconductor
C] Both A] & B]
D] None of these
41. _______ is a semiconductor in which number of free electron is much greater than hole.
A] Extrinsic Semiconductor
B] N type semiconductor
C] Intrinsic Semiconductor
D] None of these
42. _______ is a semiconductor in which number of holes is much greater than electron.
A] Extrinsic Semiconductor
B] N type semiconductor
C] Intrinsic Semiconductor
D] P type semiconductor
43. If bar magnet is broken into two pieces the pole strength of each half will be ________
A] ½
B] Same
C] double
D] ¼
44. In series combination current passing through each resistor is ______
A] Different
B] Zero
C] High
D] Same
45. In case of semiconductors, the band gap energy is ______
A] Varying and more than 3 eV
B] More than 3 eV
C] Less than 3 eV
D] Equal to 3 eV
46. In P type semiconductor ______
A] Holes are majority
B] holes & e- carries are in equal amount
C] Electron are majority charge carriers
D] Holes are minority charge carriers
47. When PN junction diode is connected in forward biased condition, then the width of depletion layer ______
A] Increases & these decreases
B] Decreases
C] Increases
D] Remain same
48. ______ of the following is not an application of PN junction diode.
A] Used in rectifier
B] Used as clippers
C] Used as clamper
D] Used as filter
49. Which of the following is a semiconductor material ?
A] Ebonite
B] Aluminum
C] Germanium
D] Carbon
50. Which of the following is an application of PN junction diode ?
A] Used in demodulator circuit
B] Used in voltage multipliers
C] Used in detector circuit
D] All of these
A] 4
B] 2
C] 3
D] 5
Answer: B] 2
2. The substance receiving electrons becomes _______ charged.
A] Negatively
B] Positively
C] Neutral
D] None of thesse
Answer: A] Negatively
3. The substance which losses electrons becomes _______ charged.
A] Negatively
B] Neutral
C] Positively
D] None of thesse
Answer: C] Positively
4. Charge is measured in _______
A] Candela
B] Negative
C] Positive
D] Coulomb
Answer: D] Coulomb
5. The force of attraction or repulsion between two charge and these charges are separated by distance is ________
A] Ohm’s law
B] Coulomb’s Inverse Square Law
C] Law of parallel combination
D] Newton's third law of motion
Answer: B] Coulomb’s Inverse Square Law
6. A charged body placed near a charge will experience a force. The region in which a charge experiences a force is called ________
A] Magnetic field
B] Magnetism
C] Electric field
D] Magnetic field intensity
Answer: C] Electric field
7. Electric Intensity is measured in ______
A] N/C
B] Wb
C] EI
D] A-m
Answer: A] N/C
8. A charged sphere of 60 micro coulomb is placed in air. Find the electric field intensity at a point 30cm from the center of sphere
A] 6 X 10-6 N/C
B] 6 X 109 N/C
C] 6 X 106 N/C
D] 9 X 106 N/C
Answer: C] 6 X 106 N/C
9. What is the S.I. unit of potential ?
A] joule/ coulomb
B] ampere
C] joule × coulomb
D] mole
Answer: A] joule/ coulomb
10. Calculate the potential at point 10 cm away from a charge of 300 𝜇𝑐, in air
A] 26 x 10-4 v
B] 27 x 10-4 v
C] 25 x 104 v
D] 27 x 104 v
Answer: D] 27 x 104 v
11. _______ is defined as the property by virtue of which a magnetic material is able to create an attraction or repulsion force.
A] Magnetic field intensity
B] Magnetic field
C] Magnetism
D] Magnetic lines of force
Answer: C] Magnetism
12. Every substance is made up of tiny units called _____
A] Proton
B] Atoms
C] Neutron
D] None of these
Answer: C] Atoms
13. A _______ can be produced by either movement of charge or a magnetized material.
A] Magnetic field
B] Magnetic field intensity
C] Electric potential
D] None of these
Answer: A] Magnetic field
14. Magnetic field is denoted as _____
A] MF
B] M
C] F
D] B
Answer: D] B
15. What is the S.I. unit of magnetic field ?
A] joule
B] tesla(T)
C] coulomb
D] gauss
Answer: B] tesla(T)
16. Which statement is wrong about magnetic lines of force ?
A] They never intersect each other.
B] The magnetic field is tangent to the magnetic lines of force.
C] All the lines of force have same strength.
D] None of these
Answer: D] None of these
17. _______ is the number of magnetic field lines passing through a closed loop surface.
A] Magnetic field
B] Magnetic field intensity
C] Magnetic Flux
D] Magnetic lines of force
Answer: C] Magnetic Flux
18. The amount of magnetic lines of forces set up in magnetic circuit is called _____
A] Magnetic field
B] Magnetic field intensity
C] Magnetic Flux
D] Magnetic lines of force
Answer: C] Magnetic Flux
19. What is the S.I. unit of magnetic flux ?
A] weber(wb)
B] tesla(T)
C] coulomb
D] gauss
Answer: A] weber(wb)
20. The direction of magnetic field within a magnet is from ______ Pole to ______ Pole.
A] South, East
B] North, South
C] South, North
D] South, West
Answer: C] South, North
21. Current =
A] Time x Charge
B] Charge x Time
C] Time / Charge
D] Charge / Time
Answer: D] Charge / Time
22. According to ________, the current flowing through the conductor is directly proportional to potential difference applied across its ends, provided physical state of the conductor ( material, length, cross-sectional area, temperature) remains same.
A] Law of parallel combination
B] Ohm’ law
C] Coulomb’s Inverse Square Law
D] Newton's third law of motion
Answer: B] Ohm’ law
23. If, ‘I’ is current flowing through the conductor and ‘V’ is the potential difference across the conductor then,
A] I/V
B] V x I
C] V/I
D] V 𝛼 I
Answer: D] V 𝛼 I
24. When temperature & nature of material of conductor remain same, the resistance of a conductor depends on :
A] Length :- It is observed that resistance of the conductor is directly proportional to its length. R 𝛼 L
B] Area of cross-section:- the resistance of the conductor is inversely proportional to its cross-sectional area
C] Both A] & B]
D] None of these
Answer: C] Both A] & B]
25. The unit of conductance is ______
A] mho (Ʊ)
B] C
C] Wb
D] None of these
Answer: A] mho (Ʊ)
26. The effective resistance offered by two or more resistors connected in series combination is the algebraic sum of resistances of the individual resistors. This ststement is belongs to which law ?
A] Ohm’s law
B] Law of parallel combination of resistance
C] Law of resistance in series combination
D] None of these
Answer: C] Law of resistance in series combination
27. ______ states that the reciprocal of effective resistance offered by two or more resistors connected in parallel combination is equal to the algebraic sum of the reciprocals of the resistances of individual resistors.
A] Ohm’s law
B] Law of parallel combination of resistance
C] Law of resistance in series combination
D] None of these
Answer: B] Law of parallel combination of resistance
28. The heating effect of an electric current depends on _____
A] The resistance, R of the conductor. A higher resistance produces more heat.
B] The time, t for which current flows. The longer the time the larger the amount of heat produced.
C] The amount of current, I. the higher the current the larger the amount of heat generated.
D] All of these
Answer: D] All of these
29. When current flows through a conductor, the heat produced in a conductor is directly proportional to the product of square of current (I2), resistance of the conductor (R) and the time (t) for which current is passed. This ststement is belongs to which law ?
A] Ohm’s law
B] Law of parallel combination of resistance
C] Joule’s law
D] Law of resistance in series combination
Answer: C] Joule’s law
30. An electrical bulb is labeled 100W, 240V. Calculate:
1. The current through the filament when the bulb works normally
2. The resistance of the filament used in the bulb.
A] I = 0.4167 A & R = 576.04 Ω
B] I = 0.1847 A & R = 436.45 Ω
C] I = 576.04 A & R = 0.4167 Ω
D] I = 0.4155 A & R = 586.74 Ω
Answer: A] I = 0.4167 A & R = 576.04 Ω
31. The material which allow electric current to flow through them easily are called _______
A] Conductor
B] Semiconductor
C] Insulator
D] All of these
Answer: A] Conductor
32. Which of the following is the is a good conductor of electricity ?
A] Copper
B] Gold
C] Silver
D] All of these
Answer: D] All of these
33. The material which does not allow electric current to flow through them easily are called _______
A] Conductor
B] Semiconductor
C] Insulator
D] All of these
Answer: C] Insulator
34. The material which has conductivity in between metal & insulator is called _______
A] Conductor
B] Semiconductor
C] Insulator
D] All of these
Answer: B] Semiconductor
35. Semiconductor are insulators at ______ temperature and act as conductors at ______ temperature.
A] Low, High
B] High, High
C] High, Low
D] Low, Low
Answer: A] Low, High
36. ________ is the kinetic energy gained by an electron when accelerated trough potential difference of one volt.
A] One valance electron
B] Valance electron
C] One electron volt
D] None of these
Answer: C] One electron volt
37. The band formed by the series of energy levels containing the valance electrons is known as _______
A] Valance band
B] Valance electron
C] Conduction band
D] None of these
Answer: A] Valance band
38. The conduction band may also be defined as the _______
A] Highest unfilled energy band
B] Lowest filled energy band
C] Valance band
D] Lowest unfilled energy band
Answer: D] Lowest unfilled energy band
39. Identify the types of semiconductor.
A] Extrinsic Semiconductor
B] Intrinsic Semiconductor
C] Both A] & B]
D] None of these
Answer: C] Both A] & B]
40. The conductivity of semiconductor is increased by adding a small amount of suitable impurity to pure semiconductor such materials are known as _______
A] Extrinsic Semiconductor
B] Intrinsic Semiconductor
C] Both A] & B]
D] None of these
Answer: A] Extrinsic Semiconductor
41. _______ is a semiconductor in which number of free electron is much greater than hole.
A] Extrinsic Semiconductor
B] N type semiconductor
C] Intrinsic Semiconductor
D] None of these
Answer: B] N type semiconductor
42. _______ is a semiconductor in which number of holes is much greater than electron.
A] Extrinsic Semiconductor
B] N type semiconductor
C] Intrinsic Semiconductor
D] P type semiconductor
Answer: D] P type semiconductor
43. If bar magnet is broken into two pieces the pole strength of each half will be ________
A] ½
B] Same
C] double
D] ¼
Answer: B] Same
44. In series combination current passing through each resistor is ______
A] Different
B] Zero
C] High
D] Same
Answer: D] Same
45. In case of semiconductors, the band gap energy is ______
A] Varying and more than 3 eV
B] More than 3 eV
C] Less than 3 eV
D] Equal to 3 eV
Answer: C] Less than 3 eV
46. In P type semiconductor ______
A] Holes are majority
B] holes & e- carries are in equal amount
C] Electron are majority charge carriers
D] Holes are minority charge carriers
Answer: A] Holes are majority
47. When PN junction diode is connected in forward biased condition, then the width of depletion layer ______
A] Increases & these decreases
B] Decreases
C] Increases
D] Remain same
Answer: B] Decreases
48. ______ of the following is not an application of PN junction diode.
A] Used in rectifier
B] Used as clippers
C] Used as clamper
D] Used as filter
Answer: D] Used as filter
49. Which of the following is a semiconductor material ?
A] Ebonite
B] Aluminum
C] Germanium
D] Carbon
Answer: C] Germanium
50. Which of the following is an application of PN junction diode ?
A] Used in demodulator circuit
B] Used in voltage multipliers
C] Used in detector circuit
D] All of these
Answer: D] All of these
 MCQs - Chapter 2: Electricity, Magnetism and Semiconductors (Physics) MCQs |MSBTE I Scheme ){kind=link}
0 Comments
Your comments are helpful for us in the upcoming period.!