The rotating part of an electric generator is termed as ____.
An electric generator works on the principle of ___.
force on a current carrying conductor
Joule’s heating effect
Which position of the coil in the magnetic field gives maximum emf?
What is the energy transformation in a moving coil microphone?
Heat energy to Sound energy
Sound energy to Electrical energy
Sound energy to Light energy
Electrical energy to Sound energy
An electric generator is a device which works on the principle of electromagnetic induction.
The arm of an electric generator with split rings is rotated clockwise. Then the deflection of the galvanometer will be ___
shifting between left and right.
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
In the figure given below, a coil is placed between two permanent magnets and is rotated with the help of an axle on which two rings R1 and R2 are internally attached. B1 and B2 represents two metallic brushes. G represents galvanometer.
In the given setup, if the axle moves with constant speed the current through the arm AB and CD :
flows in the same direction always.
reverses direction periodically.
reverses direction non-periodically.
An armature consists of an arrangement of insulated copper wires wound around a soft iron core.
- armature coil
- field magnet