Advertisements
Advertisements
Question
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
Solution
increasing the size of the gap in which the armature turns
The increase in the size of the gap, in which armature turns, has no effect on voltage.
APPEARS IN
RELATED QUESTIONS
The device used for producing electric current is called a ______.
Why are Thermal Power Stations usually located near a river?
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.
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
Draw a labelled diagram of a simple a.c. generator.
What energy conversion does take place in a generator when it is in use?
Explain the difference:
AC generator and DC generator.
Draw a neat labeled diagram of an A.C. generator
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
Observe the following diagram and answer the questions.
- Explain the construction of the equipment shown in the figure.
- How is AC generated?
