Second Year Physics Chapter 14 Online MCQ Test for 2nd Year Physics Chapter 14 Electromagnetism Preparation

The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by

• 
  A
• 
  B
• 
  C
• Bevm D

Two parallel wires carrying currents in the opposite direction.

• Repel each other A
• Attract each other B
• Have no effect upon each other C
• They cancel out their individual magnetic fields. D

A dot represents the direction of magnetic field.

• Out of page A
• Into the page B
• Tangent to page C
• Parallels to page 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

Torque on a current carrying coil

• τ=IBA cos A
• τ = ILB sinα B
• τ = IBA sinα C
• τ = ILBcosα D

The brightness of the spot of CRO screen is controlled by.

• Anode A
• Cathode B
• Grid C
• Deflecting plates D

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

The value of e/m is smallest for

• Proton A
• Electron B
• Beta particle C
• Positron 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

Torque is produced in a current carrying coil when it is placed in a

• Magnetic field A
• Electric field B
• Gravitational field C
• Nuclear field D

In current carrying long solenoid the magnetic field produced does not depend upon.

• The radius of solenoid A
• Number of turns per unit length B
• Current flowing through solenoid C
• All of the above D

___ is correct relation.

• IT = 10^-4 G A
• IT = 10⁴ G B
• IT = 10² G C
• IT = 10 ^-2 G D

The anodes in cathode ray oscilloscope.

• Control number of waves A
• Control brightness of sept formed B
• Accelerate as well as focus beam C
• Negative potential w.r.t to chithode D

Shunt resistance is

• Low resistance A
• Zero resistance B
• High resistance C
• Impedance D

1 tesla =

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

The unit of magnetic induction is:

• Tesla  A
• Weber B
• Weber metre C
• NAm^-1 D

For  accurate measurement of current through a circuit, the resistance of ammeter should be

• Very small A
• Very high B
• Neither small nor high C
• None of the above D