Home
Class 9
PHYSICS
A steel bar can be magnetized by passing...

A steel bar can be magnetized by passing alternating current through a coil wound on the steel bar.

Text Solution

Verified by Experts

The correct Answer is:
F
Promotional Banner

Similar Questions

Explore conceptually related problems

A steel bar is magnetized by keeping it inside a long coil of insulated copper wire and passing a current through the coil. Discuss what happen to the pole strength of the magnet as the time for which the electric current passes through the coil increases.

A bar of steel can be permanently magnetised by

Arrange the following statement is sequential order to magnetize a steel bar using single touch method. (a) Once, it has reached the other end, lift the magnet away from the steel bar and again bring it to the starting point. (b) Keep a steel bar to be magnetized on a wooden table. (c) Take a strong magnet and bring one of the poles of the magnet near one end of the steel bar and gently rub from one end to the other end. (d) Repeat this process several times.

A steel bar 10.0 cm long is welded end to end to a copper bae 20.0 cm long. Both bars are insulated perfectly on their sides . Each bar has a separate cross-section, 2.00 cm on a side . The free end of the steel bar is maintained at 100^(@)C by placing it in contact with ice . find the temperature at the junction of the two bars and the total rate of heat flow . thermal conductivity of steel = 50.2 Wm^(-1)K^(-1) .thermal conductivity of copper =385 Wm^(-1)K^(-1) .

In the single touch method of magnetization , the north pole of a bar magnet is rubbed against a steel rod. Then the polarity of the end of the steel rod at which the magnet leaves