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प्रश्न
Name and state the principle of a simple a.c. generator. What is its use?
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उत्तर
An A.C. generator works on the principle of 'electromagnetic induction'.
Statement: Whenever a coil is rotated in a magnetic field, the magnetic flux linked with the coil changes, and therefore, an EMF is induced between the ends of the coil. Thus, a generator acts like a source of current if an external circuit containing load is connected between the ends of its coil.
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संबंधित प्रश्न
What change should be made in an a.c. generator so that it may become a d.c. generator?
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A generator with commutator produces ............... current.
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Each one of the following changes will increase emf (or voltage) in a simple generator except:
(a) increasing the number of turns in the armature coil
(b) winding the coil on a soft iron armature
(c) increasing the size of the gap in which the armature turns
(d) increasing the speed of rotation
A d.c. generator is based on the principle of:
(a) electrochemical induction
(b) electromagnetic induction
(c) magnetic effect of current
(d) heating effect of current
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A miniature circuit breaker (MCB) works on the heating effect of current.
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State change that you would make to convert an A.C. generator into a D.C. generator. Illustrate the change by a diagram.
State true or false:
The frequency of AC is 50 Hz.
