# 12th Physics Unit 14 Electromagnetism Past Papers MCQs

12th Physics unit 14 electromagnetism past papers MCQs with keys. 2nd-year Physics chapter wise past papers of Physics. Download in pdf.

## 12th Physics Unit 14 Electromagnetism

Cathode ray oscilloscope works by deflectin a beam of:
(A) Neutrons
(B) Protons
(C) Electrons

The CRO is used for:
(A) Displaying the wave form of frequency
(B) Displaying the wave form of given vibration
C Displaying wave form of given voltage
(D) Converting A.C into D.C

The magnetic force is simply a:
(A) Reflecting force
B) Deflecting force
(C) Restoring force

A charged particle enters in a strong magnetic field its K.E.
(A) Remain constant
(B) Increases
(C) Decreases

Cathode ray oscilloscope works by deflecting beam of:
(A) Neutrons
(B) Electrons
(C) Protons

Magnetic lines of force are:
(A) Imaginary
(B) Real
(C) Perpendicular
(D) In phase with electric lines of force

### 2nd Year Physics Chapter 14 MCQs

A current carrying conductor experiences maximum magnetic force in a uniform magnetic
field when it is placed: (SGD. GI, 2017)
(A) Perpendicular to field
(B) Parallel to field
(C) At an angle of 60° to the field
(D) At an angle of 180° to the field

Torque on a current carrying coil is given by: (GRW. GI, 2014) (GRW. GII, 2015)
(A) ILB cos of
(B) ILB sin of
(C) IBA cos o
(D) IBA sin

Torque is produced in a current carrying coil when it is placed in a: (SGD. GI, 2016)
(A) Magnetic field
(B) Electric field
(C) Gravitational field
(D) Nuclear field

The SI unit of magnetic induction Tesla is equal to: DGK. GII, 2017)
(A) NA-‘m-‘
(B) NAm-
(C) NA-‘m
(D) NA?m-1

The SI unit of magnetic permeability is: (DGK. GI, 2014)
A) WbA-‘m-‘
(B) Wbm-
(C) WbmA-1
(D) WbAm-

#### Fsc Physics Class 12 Physics MCQs

Sensitivity of a galvanometer can be increased by: (LHR. GII, 2014) (LHR. GI, 2016)
(A Decreasing the value of tersional couple.
(B) Deaeasing number of turns.
(C) Decreasing area of plane of coil.
(D) Decreasing magnetic field.

Galvanometer can be made more sensitive if the value of factor is: (LHR. GI, DGK. GI, 2017)
(C) Remanned constant

The sensitivity of galvanometer directly depends upon. (LHR. GI, 2014) (LHR. GII, 2018)
(A) Magnetic field
(B) Area of coil
(C) Both a & b
(D) None of a, b, c.

The value of permeability of free space in SI unit is: (FBD. GI, BWP. GI, 2014)
(A) 4×10-9WbA-‘m-
(B) 47×10-7wba-‘m-
(C) 47×10-10WbA-‘m-‘
(D) 47x107WbA-‘m-‘

Magnetic flux density is measured in: (BWP. GI, 2014)
(A) Weber
(B) Weber/m2
(C) Tesla-m
(D) Gauss

The SI unit of magnetic induction Tesla is equal to:
(A) N’Am
(B) NAM?
(C) NA 2
DNA-m!