2nd Year Physics Chapter 14 Online MCQ Test for 12th Class Physics Chapter 14 (Electromagnetism)

The force on a charge particle moving parallel to magnetic field is:

• Maximum A
• Minimum B
• Zero C
• None of these D

The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is.

• ms-2 A
• ms B
• ms^-1 C
• m-1s-1 D

Sensitivity of a galvanometer can be increased by

• Decreasing the value of torsional couple A
• Decreasing number of turns B
• Decreasing area of plane of coil C
• Decreasing magnetic field D

• 
  A
• 
  B
• 
  C
• None of the above D

Magnetic flux density is measured in

• Weber A
• Weber/m2 B
• Tesla -m C
• Gauss D

CRO works by deflecting the beam of electron as they pass through

• Uniform magnetic field A
• Uniform electric field between two sets of parallel plates B
• Non-uniform magnetic field C
• None of these D

1 tesla =

• 1 MAm^-1 A
• 1NA^-1m B
• 1NA^-1m^-1 C
• None of above D

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

• two times A
• three times B
• four times C
• Half D

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

• Half A
• Double B
• Remain same C
• Zero D

A galvanometer is an electrical instrument used to

• Measure resistance A
• Measure voltage B
• Detect passage of current  C
• None of these D

e/m=

• v/Br A
• Br/V B
• VB/r C
• Vr/B D

The sensitivity of Galvanometer can be increased by:

• Increasing C/BAN factor A
• Decreasing C/BAN factor B
• Increasing angle θ C
• All of above D

The magnetic flux will be max, For an angle of:

• 0° A
• 60° B
• 90° C
• 180° D

Lorentz force means the force acting on a particle, which is

• Magnetic force only A
• Electric force only B
• Sum of electric and magnetic force C
• None of these D

Magnetic lines of force are.

• Imaginary A
• Real B
• Perpendicular C
• In phase with electric lines of force D

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

• Speed A
• Kinetic energy B
• Path of motion C
• angular velocity D

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

• Ammeter A
• Voltammeter B
• Ohmmeter C
• Multimeter D