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

In order to measure potential difference voltmeter is always connected in.

• Series A
• Parallel B
• Both a and b C
• Neither in series nor in parallel D

Useful device to measure resistance, current and voltage is an electronic instrument called.

• Volt meter A
• Ammeter B
• Ohmmeter C
• Digital Multimeter D

Galvanometer is sensitive when C/BAN is

• zero A
• Large B
• small C
• Negative 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

___ is correct relation.

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

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

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

The SI unit of flux density is.

• NA-1 m2 A
• NA-1 m-1 B
• NAm-1 C
• NA-1 m D

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

The unit of magnetic induction is:

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

The name of the scientist who noted that a compass needle was deflected when placed near the current carrying conductor

• Henry A
• Faraday B
• Coloumb C
• Oersted D

Current passing through the coil of galvanometer

• CO/BAN A
• CoN /BA B
• NAB/CO C
• AN/BCO D

μ_∘ (Ampere's constant) has value. 

• 4πx10^-7 WbA^-1m^-1 A
• 4πx10^-17 Wbm² B
• 4πx10⁷ WbA^-1m^-1 C
• 4πx10-27 Wb/m² D

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

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

• Perpendicular to field A
• Parallel to field B
• At an angle of 60 ^o to the field C
• None of these D

e/m=

• v/Br A
• Br/V B
• VB/r C
• Vr/B D

Torque on a current carrying coil

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

Magnetism is related to:

• Stationary charges A
• Moving charges B
• Stationary & Movingcharges C
• Law of motion D