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

Force on a charged particle is zero when projected at angle with magnetic field.

• 0 ^o A
• 90^o B
• 180^o C
• 270^o D

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

When Ohm meter gives full scale deflection it indicates.

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

The dimensions of magnetic flux are

• M¹L^-2T¹A¹ A
• MLT^-2A^-1 B
• ML²T²A^-1 C
• ML²T^-2A^-1 D

If an electron is prijected in a magnetic field with velocity V, it will experience a force

• 
  A
• 
  B
• 
  C
• 
  D

Which one has the least resistance.

• Galvanometer A
• Ammeter B
• Ohm meter C
• Volta meter D

The value of e/m is smallest for

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

A photon while passing thorugh a magnetic field are deflected towards:

• North pole A
• South pole B
• Are ionized C
• None of these D

The Grid 'G' in cathode ray oscilloscope.

• Accelerate as well as focus electron beam A
• Control no. of electrons beam B
• Is at - Ve potential with respect to cathode. C
• Both d and b  D

Brightness of screen of CRO controlled by

• Grid A
• Filament B
• Anode C
• Cathode D

Shunt resistance is

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

The magnetic field  inside solenoid is given:

• μ_∘nI² A
• μ_∘nI B
• μ_∘n/1² C
• μ_∘I/n 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

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

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

The magnetic field is uniform and stronger

• Outside the solenoid A
• Inside the solenoid B
• At the central part of the solenoid C
• None of these 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

A moving charge is surrounded by:

• 2 Fields A
• 3 Fields B
• 4 Fields C
• None of these D