Electromagnetic Induction | Magnetic Effects of Electric Current | Assessment | English | Grade 10

Which of the following ways can be used to generate electricity?

• Rotating a coil of copper wire in the presence of magnetic field

• Rotating a coil of copper wire near a soft iron core

• Using a generator having two magnets of same pole facing each other.

• By switching on the light switch on the wall

Answer explanation

If we rotate a coil of copper wire in the presence of magnetic field then an electric current is induced in the system.

Tags

NGSS.HS-PS2-5

What will not happen if a bar magnet will moves towards the coil and then away from the coil in the following set up?

• There will be a deflection in the galvanometer towards one side when the bar magnet moves towards the coil

• As soon as the motion of the magnet stops the needle will come at zero again

• The deflection will be permanent till we don't remove the magnet

• There will be a deflection in the galvanometer towards another side when bar magnet moves away from the coil

Answer explanation

The deflection of the needle is not permanent. It will come to zero as soon as the motion of the bar magnet stops.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which of the following relation is true for Fleming's Right Hand Rule?

• Index Finger - Magnetic Field Middle Finger - Movement of the Conductor Thumb - Induced Current

• Index Finger - Induced Current Middle Finger - Magnetic Field Thumb - Movement of the Conductor

• Index Finger - Movement of the Conductor Middle Finger - Induced Current Thumb - Magnetic Field

• Index Finger - Magnetic Field Middle Finger - Induced Current Thumb - Movement of the Conductor

Answer explanation

The correct representation of Fleming's Left Hand Rule is shown in Option 4.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Label the Coil 1 and Coil 2 correctly.

• Coil 1 - Secondary Coil 2 - Primary

• Coil 1 - Primary Coil 2 - Secondary

• Coil 1 - Secondary Coil 2 - Secondary

• Coil 1 - Primary Coil 2 - Primary

Answer explanation

Coil 1 is connected with the electricity source. Hence coil 1 is primary and coil 2 is secondary.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5