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

Torque on a current carrying coil

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

The effective way to increase the sensitivity of moving coil galvanometer is.

• Increase the area of coil A
• Increase the number of turn B
• Increase the magnetic field C
• Increase the value of constant C 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

Which one of the following resistance is used to convert a Galvanometer into an ammeter.

• High resistance A
• Low resistance in series with galvanometer B
• Shunt C
• High resistance in series with galvanometer D

Magnetic flux density is measured in

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

The sensitivity of galvanometer directly depends upon

• Magnetic field A
• Area of coil B
• Both a and b C
• None of a, b, c D

A positive charge is moving towards an observer, The direction of magnetic induction will be.

• Toward right A
• Anti clockwise B
• Clockwise C
• Toward left D

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

The SI unit of magnetic induction Tesla is equal to

• N-1 Am A
• NA m2 B
• NA-1n2 C
• NA-1m-1 D

A sensitive galvanometer is

• Unstable A
• Stable B
• Moderate C
• Both B and C D

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

• 0° A
• 60° B
• 90° C
• 180° D

Magnetic flux density at a point due to current carrying coil is determined by

• Ampere's law A
• Faraday's law B
• Lenz's law C
• Gauss's law 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

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

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

• Be doubled A
• Become half B
• Not change C
• Be four time D

If the length of solenoid is doubled but N same, B inside the solenoid becomes.

• Half A
• Doubled B
• One fourth C
• Four times D

Energy stored per uint volume inside a solenoid is called as

• energy density A
• Electric flux B
• Work C
• Volume charge density D