Advertisements
Advertisements
प्रश्न
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is pushed into the coil?
उत्तर
The needle of the galvanometer shows a momentary deflection in a particular direction.
APPEARS IN
संबंधित प्रश्न
State the principle of an electric generator.
Which sources produce alternating current?
The device used for producing electric current is called a ______.
What change should be made in an a.c. generator so that it may become a d.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
An electric generator converts:
(a) electrical energy into mechanical energy.
(b) mechanical energy into heat energy.
(c) electrical energy into chemical energy.
(d) mechanical energy into electrical energy.
Name and state the principle of a simple a.c. generator. What is its use?
Observe the figure and write the answers to the questions asked.
- The construction shown in the figure is of which device?
- Explain the principle on which this device works.
- Write any three uses of this device.
The part of the AC generator that passes the current from the armature coil to the external circuit is ______.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
