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. Torque on current carrying coil is:

τ = NIABsinα

τ = N / IABcosα

τ = NIABcosα

τ = N / IABsinα

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

None

left hand

right hand

Both hands

#3. 1T =

Siemen

m^2/Wb

Wbm^2

Wb/m^2

#4. Magnetic flux density through solenoid B =

N/μoI

μonI

μon/I

I/μon

#5. 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)

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

antiparallel

circular

perpendicular

parallel

#7. Lorentz force F =

Fb + Fc

Fe + Fb

Fm + Fc

Fc + Fe

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

current

force

potential difference

field

#9. Fe =

q(v x B)

I(L x B)

q/E

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

±e(vxB)

∓e(v x B)

-e(v x B)

+e(v x B)

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

Perpendicular

Parallel

All

Antiparallel

#12. Mass of proton is:

9.1 × 10^-27 kg

9.1 × 10^-31 kg

1.6 × 10^-31 kg

1.67 × 10^-27 kg

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

μo/I2πr

None

μoI2πr

μoI/2πr

#14. Magnetic force provide _____ work.

minimum

maximum

none

zero

#15. e/m of electron is:

1/1

2/1

0/1

1/0

#16. _____ are used to accelerate electrons.

screen

cathodes

anodes

grids

#17. B.ΔL =

μo/I

μ^2/I

μoI

μ^2I

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

erectness

brightness

smoothness

dullness

#19. Fb =

I(L x B)

q/E

q(v x B)

#20. Magnetic force is _____ force.

defracting

deflecting

refracting

None

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

All

electric force

gravitational force

Pauli's force

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

0°

180°

90°

60°

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

v x B

I x B

v x L

L x B

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

Parallel

Perpendicular

All

Antiparallel

#25. Mass of electron is:

9.1 × 10^-27 kg

1.6 × 10^-31 kg

9.1 × 10^-31 kg

1.6 × 10^-27 kg

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

grid

filament

screen

time base generator

#27. 1T =

1AM/N

1N/AM

1M/AN

1NAM

#28. e/m of proton is:

2/1

1/0

1/1

0/1

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

90°

180°

60°

0°

#30. In CRO, thermionic emission occurs at:

deflection plates

screen

anode

cathode

#31. F =

ILBsinα

I/LBsinα

NIABcosα

N/IABcosα

#32. e/m =

VBr

V/Br

2V/Br

r/VB

#33. The value of μo is _____.

All

4πx10^-7 Wb/A/m

4π/10^-7 Wb/A/m

4πx10^-7 WbAm

#34. Magnetic Flux is a _____ quantity.

None

Base

Scalar

Vector

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

interaction of fileds

variable fields

All

distraction of fields

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

potentiometer

rheostat

thermistor

filament

#37. e/m of neutron is:

1/0

2/1

1/1

0/1

#38. magnetic behavior of current was discoved by:

Oster and Ampere

Faraday and Ampere

All

Oster and Faraday

#39. μo is called _____.

permitivity

Planck’s Constant

Ampere Constant

permutation

#40. Electromagnetism deals with:

electric field

magnetic field and gravitational field

magnetic field

electric field and magnetic field

Finish

MCQs Physics Chapter 14 Electromagnetism

Results

#1. Torque on current carrying coil is:

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

#3. 1T =

#4. Magnetic flux density through solenoid B =

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

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

#7. Lorentz force F =

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

#9. Fe =

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

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

#12. Mass of proton is:

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

#14. Magnetic force provide _____ work.

#15. e/m of electron is:

#16. _____ are used to accelerate electrons.

#17. B.ΔL =

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

#19. Fb =

#20. Magnetic force is _____ force.

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

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

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

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

#25. Mass of electron is:

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

#27. 1T =

#28. e/m of proton is:

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

#30. In CRO, thermionic emission occurs at:

#31. F =

#32. e/m =

#33. The value of μo is _____.

#34. Magnetic Flux is a _____ quantity.

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

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

#37. e/m of neutron is:

#38. magnetic behavior of current was discoved by:

#39. μo is called _____.

#40. Electromagnetism deals with:

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