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

Results

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#1. B.ΔL =

μo/I

μoI

μ^2I

μ^2/I

#2. Fb =

q/E

q(v x B)

I(L x B)

#3. e/m of proton is:

1/1

2/1

0/1

1/0

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

screen

grid

time base generator

filament

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

90°

60°

0°

180°

#6. Magnetic flux density through solenoid B =

I/μon

μonI

N/μoI

μon/I

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

All

Parallel

Perpendicular

Antiparallel

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

circular

perpendicular

antiparallel

parallel

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

rheostat

thermistor

potentiometer

filament

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

Antiparallel

Parallel

All

Perpendicular

#11. Torque on current carrying coil is:

τ = NIABcosα

τ = N / IABsinα

τ = NIABsinα

τ = N / IABcosα

#12. 1T =

1M/AN

1NAM

1N/AM

1AM/N

#13. Lorentz force F =

Fb + Fc

Fm + Fc

Fe + Fb

Fc + Fe

#14. Electromagnetism deals with:

magnetic field and gravitational field

electric field

electric field and magnetic field

magnetic field

#15. Fe =

I(L x B)

q/E

q(v x B)

#16. F =

ILBsinα

N/IABcosα

I/LBsinα

NIABcosα

#17. Mass of electron is:

1.6 × 10^-27 kg

1.6 × 10^-31 kg

9.1 × 10^-31 kg

9.1 × 10^-27 kg

#18. μo is called _____.

Planck’s Constant

permitivity

permutation

Ampere Constant

#19. Magnetic Flux is a _____ quantity.

None

Vector

Scalar

Base

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

+e(v x B)

-e(v x B)

±e(vxB)

∓e(v x B)

#21. 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)

#22. e/m =

V/Br

2V/Br

VBr

r/VB

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

force

potential difference

current

field

#24. e/m of neutron is:

1/0

1/1

2/1

0/1

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

90°

60°

0°

180°

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

right hand

left hand

None

Both hands

#27. _____ are used to accelerate electrons.

anodes

grids

cathodes

screen

#28. The value of μo is _____.

4π/10^-7 Wb/A/m

4πx10^-7 WbAm

4πx10^-7 Wb/A/m

All

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

L x B

v x L

I x B

v x B

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

μoI/2πr

None

μoI2πr

μo/I2πr

#31. Magnetic force provide _____ work.

minimum

zero

maximum

none

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

dullness

smoothness

brightness

erectness

#33. Magnetic force is _____ force.

None

refracting

deflecting

defracting

#34. 1T =

Wb/m^2

Siemen

m^2/Wb

Wbm^2

#35. magnetic behavior of current was discoved by:

All

Faraday and Ampere

Oster and Ampere

Oster and Faraday

#36. In CRO, thermionic emission occurs at:

cathode

anode

deflection plates

screen

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

distraction of fields

interaction of fileds

All

variable fields

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

Pauli's force

electric force

gravitational force

All

#39. e/m of electron is:

2/1

0/1

1/0

1/1

#40. Mass of proton is:

1.67 × 10^-27 kg

1.6 × 10^-31 kg

9.1 × 10^-31 kg

9.1 × 10^-27 kg

Finish

MCQs Physics Chapter 14 Electromagnetism

Results

#1. B.ΔL =

#2. Fb =

#3. e/m of proton is:

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

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

#6. Magnetic flux density through solenoid B =

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

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

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

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

#11. Torque on current carrying coil is:

#12. 1T =

#13. Lorentz force F =

#14. Electromagnetism deals with:

#15. Fe =

#16. F =

#17. Mass of electron is:

#18. μo is called _____.

#19. Magnetic Flux is a _____ quantity.

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

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

#22. e/m =

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

#24. e/m of neutron is:

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

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

#27. _____ are used to accelerate electrons.

#28. The value of μo is _____.

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

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

#31. Magnetic force provide _____ work.

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

#33. Magnetic force is _____ force.

#34. 1T =

#35. magnetic behavior of current was discoved by:

#36. In CRO, thermionic emission occurs at:

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

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

#39. e/m of electron is:

#40. Mass of proton is:

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