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

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

• two times A
• three times B
• four times C
• Half D

A charged particle enters in a strong magnetic field its K.E.

• Remain constant A
• Increases B
• Decreases C
• Increases then decreases 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

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

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

The permeability of free space is measured in

• wb A/m A
• Am/wb B
• wb/Am C
• m/wbA D

The SI unit of magnetic induction 'B' Tesla is equal to.

• NA-1m-1 A
• Nam-1 B
• NA-1 m C
• Na2m-1 D

The sensitivity of galvanometer is given by

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

The unit of magnetic induction is:

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

The function of three anodes a C.R.O is

• To accelerate electrons only A
• To focus the electrons only B
• To control the brightness of spot on screen C
• To accelerate and focus the electrons D

Magnetic induction can be measured in units of.

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

The dimensions of magnetic flux are

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

An AVO meter can also be called as.

• Digital multimeter A
• Digital voltmeter B
• Digital ammeter C
• Digital ohm meter D

Energy stored per uint volume inside a solenoid is called as

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

If a charge is at rest in a magnetic field then force on charge is

• Zero A
• Double B
• One fourth C
• Four times 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

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