Advertisements
Advertisements
प्रश्न
State the factors that can increase the speed of rotation of the coil in a D.C. motor.
Advertisements
उत्तर
The speed of rotation of the coil in a D.C. motor can be increased by:
(i) Increasing the strength of the current, (ii) Having more turns in the coil,
(iii) Increasing the area of the coil, (iv) By increasing the strength of the magnetic field.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
Which of the following methods is used to magnetize a magnetic without touching it by a magnet?
principle of an electric motor ?
Complete the following sentence :
On reserving the direction of current in a wire, the magnetic field produced by it gets _____.
Describe briefly one way of producing an induced current in a coil. State one factor that determines the magnitude of induced e.m.f.
State the purpose of the iron core.
How does a magnetic field set up by a solenoid change when number of turns are increased?
Why is soft iron generally used as the core of the electromagnet?
What energy conversion takes place during the working of a d c motor?
State and explain Maxwell’s Cork Screw Rule.
How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?
