Magnetic effect of current Worksheets

Magnetic effect of current Worksheet-1

1. Which of the following properties of a proton can change while it moves freely in a magnetic field ? (There may be more than one correct answer).

A. mass              B. speed             C. velocity          D. momentum

2. The magnetic field inside a long straight solenoid carrying current :

A. is zero

B. decreases as we move towards its end

C. increases as we move to wards its end

Magnetic effect of current Worksheet-2

1. The magnetic field produced due to a circular wire at its centre is :

A. in the plane of the wire

B. perpendicular to the plane of the wire

C. at 45° to the plane of the wire

D. at 60° to the plane of the wire.

2. A magnetic field exerts no force on :

A. an electric charge moving perpendicular to its direction

B. an unmagnetised iron bar

C. a stationary electric charge

Magnetic effect of current Worksheet-3

1. When a fuse is rated at 8 A, it means :

A. it will not work if current is less than 8 A

B. it has a resistance of 8 ohm

C. it will work only if current is 8 A

D. it will burn if current exceeds 8 A.

2. According to International Convention of colour coding of wires used in household electrical circuits :

A. live is red, neutral is black and earth is green

B. live is red, neutral is green and earth is black