Advertisements
Advertisements
Question
When an electric current flows through a copper wire AB as shown in the following figure, the wire
Options
deflects a magnetic needle placed near it.
becomes red hot.
gives electric shock.
behaves like a fuse.
Advertisements
Solution
deflects a magnetic needle placed near it.
Explanation:
A current carrying wire acts as a magnet with a magnetic field around it, the strength of which depends upon the amount of current passing through it.
APPEARS IN
RELATED QUESTIONS
Draw circuit symbols for
a cell
Draw circuit symbols for
a battery of three cells
What do you understand by the open electric circuit?
Draw a neat diagram showing a open electric circuit.
In any electric circuit, when the switch is on and the current flows through it why do the wire, switches, bulb or devices become hot?
Find the odd one out and give its explanation.
What is the role of the earth wire in domestic circuits?
A device that is used to break an electric circuit is called ______.
How is Joule's law effect useful in electric circuits where fuse is used as a safety device?
Set up the circuit shown in Figure again. Move the key to ‘ON’ position and watch carefully in which direction the compass needle gets deflected. Switch ‘OFF’ the current. Now keeping rest of the circuit intact, reverse the connections at the terminal of the cell. Again switch ‘on’ the current. Note the direction in which the needle gets deflected. Think of an explanation.
