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

Cathode ray oscilloscope works by deflecting a beams

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

The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is.

• ms-2 A
• ms B
• ms^-1 C
• m-1s-1 D

The field is strong and uniform.

• Inside the solenoid A
• Surrounding of solenoid externally B
• Perpendicular to solenoid C
• All of above D

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

• 1 x 10^-6 N A
• 6.4 x 10^-17 N B
• 3.6 x 10^-24 N C
• 4 x 10⁶ N 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

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

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

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

Brightness of screen of CRO controlled by

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

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

The sensitivity of galvanometer is given by

• CAN/B A
• C/BAN B
• BAN/C C
• BN/CA D

The galvanometer can be made sensitive by making the factor BAN/C

• Large A
• Small B
• Constant C
• Zero D

Torque on a current carrying coil

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

Magnetic induction can be measured in units of.

• Tesla A
• Gauss B
• Weber/m2 C
• All of the above D

A sensitive galvanometer is

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

The unit of magnetic induction B is

• Coulomb A
• Ampere B
• Coulomb/ampere C
• Weber/m² D

The e/m of a neutron is

• Less than electron A
• The same as electron B
• Zero C
• Greater than election D