Advertisements
Advertisements
प्रश्न
State the factors on which the strength of an electromagnet depends. How does it depend on these factors?
Explain the factors on which the strength of an electromagnet depends.
Advertisements
उत्तर
Strength of an electromagnet depends on the following factors:
- Number of turns in the coil: By increasing the number of turns in the coil, the strength of the electromagnet can be increased.
- Current flowing through the coil: By increasing the flow of current in the coil, the strength of the electromagnet can be increased.
- Length of air gaps between poles: By reducing the length of air gaps between the poles, the strength of the electromagnet can be increased.
संबंधित प्रश्न
The north-south polarities of an electromagnet can be found easily by using:
(a) Fleming's right-hand rule
(b) Fleming's left-hand rule
(c) Clock face rule
(d) Left-hand thumb rule
What condition is necessary for the production of current by electromagnetic induction?
In which of the following case does the electromagnetic induction occur?
The current is stopped in a wire held near a loop of wire .
In which of the following case does the electromagnetic induction occur?
A loop of wire is held near a magnet.
List some of the practical applications of an electromagnet.
Fleming's left hand rule : electric current : : Fleming's right hand rule : _______
A 50 cm long solenoid has 400 turns per cm. The diameter of the solenoid is 0.04 m. Find the magnetic flux linked with each turn when it carries a current of 1 A.
Which type of motor works on electromagnetic induction?
