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

All

Pauli's force

electric force

gravitational force

#2. μo is called _____.

Planck’s Constant

permitivity

permutation

Ampere Constant

#3. The value of μo is _____.

4πx10^-7 WbAm

All

4πx10^-7 Wb/A/m

4π/10^-7 Wb/A/m

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

I x B

L x B

v x L

v x B

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

circular

parallel

antiparallel

perpendicular

#6. _____ are used to accelerate electrons.

screen

grids

anodes

cathodes

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

0°

180°

60°

90°

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

time base generator

grid

filament

screen

#9. F =

I/LBsinα

N/IABcosα

NIABcosα

ILBsinα

#10. Fe =

q/E

I(L x B)

q(v x B)

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

current

force

potential difference

field

#12. magnetic behavior of current was discoved by:

All

Faraday and Ampere

Oster and Faraday

Oster and Ampere

#13. Fb =

q(v x B)

q/E

I(L x B)

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

90°

180°

60°

0°

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

right hand

Both hands

None

left hand

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

+e(v x B)

-e(v x B)

±e(vxB)

∓e(v x B)

#17. e/m of neutron is:

1/1

1/0

2/1

0/1

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

Antiparallel

All

Perpendicular

Parallel

#19. Lorentz force F =

Fc + Fe

Fe + Fb

Fm + Fc

Fb + Fc

#20. 1T =

1AM/N

1M/AN

1N/AM

1NAM

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

μoI/2πr

None

μoI2πr

μo/I2πr

#22. Magnetic force provide _____ work.

none

maximum

zero

minimum

#23. e/m =

2V/Br

r/VB

V/Br

VBr

#24. Magnetic Flux is a _____ quantity.

Vector

Base

Scalar

None

#25. Magnetic flux density through solenoid B =

N/μoI

μon/I

μonI

I/μon

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

Perpendicular

All

Parallel

Antiparallel

#27. 1T =

Siemen

Wbm^2

Wb/m^2

m^2/Wb

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

rheostat

potentiometer

thermistor

filament

#29. Magnetic force is _____ force.

refracting

deflecting

None

defracting

#30. B.ΔL =

μoI

μ^2/I

μo/I

μ^2I

#31. In CRO, thermionic emission occurs at:

anode

deflection plates

screen

cathode

#32. Mass of electron is:

9.1 × 10^-31 kg

9.1 × 10^-27 kg

1.6 × 10^-31 kg

1.6 × 10^-27 kg

#33. e/m of proton is:

1/1

0/1

1/0

2/1

#34. e/m of electron is:

0/1

1/0

1/1

2/1

#35. 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)

#36. Mass of proton is:

9.1 × 10^-27 kg

1.6 × 10^-31 kg

9.1 × 10^-31 kg

1.67 × 10^-27 kg

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

interaction of fileds

distraction of fields

variable fields

All

#38. Electromagnetism deals with:

electric field and magnetic field

magnetic field and gravitational field

electric field

magnetic field

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

smoothness

dullness

erectness

brightness

#40. Torque on current carrying coil is:

τ = NIABcosα

τ = NIABsinα

τ = N / IABcosα

τ = N / IABsinα

Finish

MCQs Physics Chapter 14 Electromagnetism

Results

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

#2. μo is called _____.

#3. The value of μo is _____.

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

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

#6. _____ are used to accelerate electrons.

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

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

#9. F =

#10. Fe =

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

#12. magnetic behavior of current was discoved by:

#13. Fb =

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

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

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

#17. e/m of neutron is:

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

#19. Lorentz force F =

#20. 1T =

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

#22. Magnetic force provide _____ work.

#23. e/m =

#24. Magnetic Flux is a _____ quantity.

#25. Magnetic flux density through solenoid B =

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

#27. 1T =

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

#29. Magnetic force is _____ force.

#30. B.ΔL =

#31. In CRO, thermionic emission occurs at:

#32. Mass of electron is:

#33. e/m of proton is:

#34. e/m of electron is:

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

#36. Mass of proton is:

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

#38. Electromagnetism deals with:

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

#40. Torque on current carrying coil is:

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