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 a clockwise direction, then this end is a ........... pole.
The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was ______.
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?
What is the function of a split ring in an electric motor?
Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?
What do you mean by the magnetic effect?
An electric bell contains an ______, consisting of coils of insulated wire wound around
iron rods.
The figure given below shows the magnetic field around the conductor. Study it and answer the questions:
- What changes are caused by increasing current?
- What do you see when the magnetic needle is kept a little away from the wire?
- In the second part of the figure, the iron filings arrange themselves in a circular manner around the wire. Why does this happen?
