An armature consists of an arrangement of insulated copper wires wound around a soft iron core.

True

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False

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Solution

The correct option is A
True

An AC generator is an electric generator that converts mechanical energy into electrical energy in form of alternative emf or alternating current. AC generator works on the principle of Electromagnetic Induction.

An armature is an arrangement of insulated copper wires wound around a soft iron core(refer the image given below). When, a current is passed through an armature coil, it causes the armature to rotate. This is used in an AC generators. So the given statement is true.

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Similar questions

Q. Why is insulated wire used in an electromagnet around a soft iron core?

Question 6
Commercial electric motors do not use

(a) an electromagnet to rotate the armature
(b) effectively large number of turns of conducting wire in the current carrying coil
(c) a permanent magnet to rotate the armature
(d) a soft iron core on which the coil is wound

An insulated copper wire is wound on a soft iron core. Current is passed through the coil such that at end ‘A’ the current flows anti- clockwise and a magnetic compass needle placed at other end ‘B’ of the coil.

i) If soft iron core is replaced by a cardboard tube, what will be the effect on the magnetic needle?

ii) What happens to the magnetic needle if the current is stopped?

Q. If the coil in a simple generator is wound around a soft iron core then:

Q. A coil of wire wound around a soft iron bar is called an electromagnet. When does an electromagnet act like a magnet?

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