Magnetic effect of current Worksheet-2
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.
A. an electric charge moving perpendicular to its direction
B. an unmagnetised iron bar
C. a stationary electric charge
D. a magnet
A. maximum B. minimum
C. zero D. same as at the poles
A. only for the period
B. less than the period
C. more than the period during which flux changes through it
D. none of these
A. telephone receiver
B. simple motor
D. moving coil galvanometer.
A. energy dissipation
B. electromagnetic induction
C. magnetic effect of current
D. heating effect of current.
A. to keep main voltage constant
B. to open the line permanently when there is an overload
C. just to show an indication when there is an overload
D. as a switch to use in an emergency.
A. the speed with which the magnet is moved
B. the number of turns of the coil
C. the strength of the magnet
D. the resistivity of the wire.
A. Faraday's law
B. Ampere's force law
C. Faraday's law and Ampere's force law respectively
D. Ampere force law and Faraday's law respectively.
A. live wire B. neutral wire
C. earth wire D. live and neutral wires.