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प्रश्न
What is the function of brushes in an electric generator?
What is the function of carbon brushes in d.c. motor?
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उत्तर
Brushes maintain the contact between slip rings (commutator) in an A.C. generator (D.C. generator). So, the current produced in the rotating coil can be tapped out through slip rings (commutator) into the brushes.
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संबंधित प्रश्न
Name some sources of direct current.
Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?
Draw the labelled diagram of an A.C. generator. With the help of this diagram, explain the construction and working of an A.C. generator.
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
Name and state the principle of a simple a.c. generator. What is its use?
Suggest two ways in an a.c. generator to produce a higher e.m.f.
An a.c. generator changes the ______energy to ______ energy.
What does the external load do in an a.c. generator?
What does the changing flux induce by Faraday's Law?
At which angles does the EMF reach its maximum magnitude?
