MCQs Physics Chapter 14 - Class 12

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Al-Huda Science Academy has designed Class 12 MCQs Physics Chapter 14 Electromagnetism for board, MdCat and ECAT preparation. These MCQs help students to prepare for their entry test papers.

Chapter 14 Electromagnetism includes topics:

Electromagnetism
Force on a current carrying coil in magnetic field
Magnetic Flux and Magnetic Density
Ampere’s law
Determination of flux density
Force on a moving charge in a magnetic field
Lorentz Force
Determination of e/m
CRO – Cathode Ray Oscilloscope
Torque on a current carrying coil

MCQs Physics Chapter 14 Electromagnetism

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#1. Mass of electron is:

9.1 × 10^-31 kg

9.1 × 10^-27 kg

1.6 × 10^-27 kg

1.6 × 10^-31 kg

#2. Magnetic force is _____ force.

None

defracting

deflecting

refracting

#3. Flux is maximum when surface is _____ to B.

All

Parallel

Perpendicular

Antiparallel

#4. Force on moving negative charge in magnetic field is:

+e(v x B)

±e(v x B)

∓e(v x B)

-e(v x B)

#5. magnetic behavior of current was discoved by:

Faraday and Ampere

Oster and Faraday

Oster and Ampere

All

#6. Lorentz force F =

Fe + Fb

Fc + Fe

Fb + Fc

Fm + Fc

#7. 1T =

1M/AN

1NAM

1AM/N

1N/AM

#8. Magnetic force provide _____ work.

none

maximum

zero

minimum

#9. Force is maximum when angle between v and B is ______.

180°

90°

60°

0°

#10. The _____ is provided to Y-plates from external source in CRO.

potential difference

current

field

force

#11. In CRO, _____ is used to heat the cathode.

thermistor

filament

potentiometer

rheostat

#12. Direction of force on a current carrying conductor in uniform magnetic field is along the palm of _____.

left hand

Both hands

right hand

None

#13. μo is called _____.

Planck’s Constant

Ampere Constant

permitivity

permutation

#14. e/m of neutron is:

1/1

1/0

2/1

0/1

#15. _____ are used to accelerate electrons.

cathodes

anodes

screen

grids

#16. Magnetic force is perpendicular to a plane containing _____.

L x B

v x L

v x B

I x B

#17. Fb =

q(v x B)

q/E

I(L x B)

#18. The force on a moving charge is due to:

variable fields

interaction of fileds

All

distraction of fields

#19. In CRO, grid controls _____ of screen.

dullness

erectness

brightness

smoothness

#20. B.ΔL =

μoI

μo/I

μ^2/I

μ^2I

#21. Magnetic flux density through solenoid B =

μon/I

I/μon

N/μoI

μonI

#22. 1T =

m^2/Wb

Wb/m^2

Wbm^2

Siemen

#23. e/m of electron is:

1/0

2/1

1/1

0/1

#24. F =

N/IABcosα

NIABcosα

I/LBsinα

ILBsinα

#25. Magnetic flux density through current carrying wire B =

μo/I2πr

None

μoI/2πr

μoI2πr

#26. Fe =

q(v x B)

q/E

I(L x B)

#27. The value of μo is _____.

4πx10^-7 WbAm

All

4πx10^-7 Wb/A/m

4π/10^-7 Wb/A/m

#28. In CRO, thermionic emission occurs at:

screen

deflection plates

anode

cathode

#29. Flux is minimum when surface is _____ to B.

All

Parallel

Perpendicular

Antiparallel

#30. Mass of proton is:

1.67 × 10^-27 kg

1.6 × 10^-31 kg

9.1 × 10^-31 kg

9.1 × 10^-27 kg

#31. e/m =

V/Br

r/VB

VBr

2V/Br

#32. In electromagnetism, electric and magnetic field are _____ to each other.

parallel

circular

perpendicular

antiparallel

#33. Lorentz force is the sum of magnetic force and _____.

electric force

All

gravitational force

Pauli's force

#34. Torque on current carrying coil is:

τ = N / IABsinα

τ = NIABcosα

τ = NIABsinα

τ = N / IABcosα

#35. e/m of proton is:

1/0

1/1

0/1

2/1

#36. Force on moving positive charge in magnetic field is:

∓e(v x B)

±e(vxB)

+e(v x B)

-e(v x B)

#37. Electromagnetism deals with:

magnetic field

magnetic field and gravitational field

electric field

electric field and magnetic field

#38. Force is minimum when angle between v and B is ______.

180°

90°

0°

60°

#39. Horizontally aligned plates in CRO are called _____.

screen

filament

grid

time base generator

#40. Magnetic Flux is a _____ quantity.

Scalar

Base

None

Vector

Finish

MCQs Physics Chapter 14 Electromagnetism

Results

#1. Mass of electron is:

#2. Magnetic force is _____ force.

#3. Flux is maximum when surface is _____ to B.

#4. Force on moving negative charge in magnetic field is:

#5. magnetic behavior of current was discoved by:

#6. Lorentz force F =

#7. 1T =

#8. Magnetic force provide _____ work.

#9. Force is maximum when angle between v and B is ______.

#10. The _____ is provided to Y-plates from external source in CRO.

#11. In CRO, _____ is used to heat the cathode.

#12. Direction of force on a current carrying conductor in uniform magnetic field is along the palm of _____.

#13. μo is called _____.

#14. e/m of neutron is:

#15. _____ are used to accelerate electrons.

#16. Magnetic force is perpendicular to a plane containing _____.

#17. Fb =

#18. The force on a moving charge is due to:

#19. In CRO, grid controls _____ of screen.

#20. B.ΔL =

#21. Magnetic flux density through solenoid B =

#22. 1T =

#23. e/m of electron is:

#24. F =

#25. Magnetic flux density through current carrying wire B =

#26. Fe =

#27. The value of μo is _____.

#28. In CRO, thermionic emission occurs at:

#29. Flux is minimum when surface is _____ to B.

#30. Mass of proton is:

#31. e/m =

#32. In electromagnetism, electric and magnetic field are _____ to each other.

#33. Lorentz force is the sum of magnetic force and _____.

#34. Torque on current carrying coil is:

#35. e/m of proton is:

#36. Force on moving positive charge in magnetic field is:

#37. Electromagnetism deals with:

#38. Force is minimum when angle between v and B is ______.

#39. Horizontally aligned plates in CRO are called _____.

#40. Magnetic Flux is a _____ quantity.

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