Question

Presence of magnetic field around an electric wire can be proved by which an
behaviour of iron filings
(i) They form a circular patterns as soon as the electricity is turned on.
(ii) Try filing fly off the card when the current is on
(iii) They do not prove anything, because it is magic trick.
(iv) None of the above

Answer 1

Explanation:

answer is option1

they form a circular pattren

Answer 2

Answer:

The presence of a magnetic field around an electric field can be proved by the formation of a circular pattern as soon as the electricity is turned on.

Explanation:

• This is because a magnetic field is created whenever a “current flows through a conductor”.
• The magnetic field created depends upon the ‘shape of the conductor’.
• In case of an electric wire, it is in form of “concentric circles or circular pattern”.
• These circles are arranged at right angles to the current-carrying electric wire.
• The strength of the magnetic field is strongest in the area near the wire.