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प्रश्न
What is the function of brushes in an electric generator?
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
State two ways in the which the current alternating current and direct current?
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
State one advantage of using a.c. over d.c.
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric Generator (AC)
Observe the figure and answer the following questions.
a) Identify the machine shown in figure.
b) Write a use of this machine.
c) How transformation of energy takes place in this machine.
Explain the construction and working of an electric generator (AC) with the help of a neat diagram.
The part of the AC generator that passes the current from the armature coil to the external circuit is ______.
A device for producing electric current is ______.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil?
State one factor that affects the magnitude of induced current in an AC generator.
