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

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

• 
  A
• 
  B
• 
  C
• None of the above 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

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

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

Magnetic lines of force are.

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

In CRO, the output waveform of time base generator is

• Circular A
• Square B
• Sinusoidal C
• Saw-toothed D

When Ohm meter gives full scale deflection it indicates.

• Zero resistance A
• Infinite resistance B
• Small resistance C
• Very High resistance D

e/m=

• v/Br A
• Br/V B
• VB/r C
• Vr/B 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

Galvanometer is sensitive when C/BAN is

• zero A
• Large B
• small C
• Negative D

Cathode ray oscilloscope works by deflecting a beams

• Neutrons A
• Protons B
• Electrons C
• Positron D

The torque in the coil can be increased by increasing:

• No. of turns A
• Current and magnetic field B
• Area of coil C
• All of the above D

To convert a galvanometer into a volt meter a high resistance is connected.

• In series A
• In parallel B
• In perpendicular C
• Along tangent D

Ampere's law is applicable to:

• Circular path A
• Rectangular path B
• To any closed path C
• Nonwe of these 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

The sum of electric and magnetic force is called.

• Maxwell force A
• Lorentz force B
• Newton's force C
• Centripetal force D