Advertisements
Advertisements
Question
An electromagnet does not attract a piece of iron.
Options
True
False
Advertisements
Solution
This statement is False.
Explanation:
- The working of an electromagnet is based on the magnetic effect of electric current.
- When current passes through it, an electromagnet behaves as a magnet, attracting a piece of iron.
APPEARS IN
RELATED QUESTIONS
When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.
Fill in the following blank with suitable words:
If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole.
Name one device which works on the magnetic effect of current.
What device reverses the current?
A coil is connected to a galvanometer. When the N-pole of magnet is pushed into the coil, the galvanometer deflected to the right. What deflection, if any, is observed when:
the magnet is a rest in the coil?
(b) State whether the following statements are true or false:
(i) Magnetic poles exist in pairs.
Answer the following question:
State the effect on the magnetic needle in Oersted’s experiment when:
(a) the current is passed through the wire.
(b) the current through the wire is increased
(c) the current through the wire is reversed.
Identify the given figure, write the labels of it.
In the arrangement shown in Figure there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then
Define the magnetic effect of electric current.
