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Magnetic Effects of Electric Current

When an elect...

Question

Question 1

When an electric current flows through a copper wire AB as shown in Figure, the wire

(a) Deflects a magnetic needle placed near it

(b) Becomes red hot

(c) Gives electric shock

(d) Behaves like a fuse

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Solution

When the current is passed through the wire, it produces magnetic field in its surrounding. This magnetic field deflects the magnetic needle kept near the coil.

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Similar questions

Q. When an electric current flows through a wire, it

(a) cools down
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The deflection of the needle of a compass when it is placed near a current carrying wire is an example of magnetic effect of electric current.

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and carries an electric current flowing upwards. Deflection of magnetic needle will be maximum when it is kept at the point

Q. Give reasons for the following.

(a) An electric current does not flow in a circuit when the switch in the in the circuit is 'open'.
(b) The wire in an electric fuse is made of a material that melts easily.
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(e) The soft strip of an electric bell gets attracted to the electromagnet when the electric ell is switched on.

Q. When electric current passes through a wire, it behave like a ______.

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Magnetic Effects of Electric Current

Standard VII Physics

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