Advertisements
Advertisements
प्रश्न
How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?
Advertisements
उत्तर
By decreasing the current flowing in the solenoid, the intensity of magnetic field decreases.
संबंधित प्रश्न

The diagram shows a coil wound around a U shape soft iron bar AB.
1) What is the polarity induced at the ends A and B when the switch is pressed?
2) Suggest one way to strengthen the magnetic field in the electromagnet
3) What will be the polarities at A & B if the direction of current is reversed in the circuit?
State two ways of magnetising an iron piece?
How will you make an iron bar electromagnet? Draw a diagram showing the polarities of the electromagnet?
Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.
What is an electromagnet?
State two factors on which the strength of induced e. m.f. depends.
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
State three factors which govern the speed of rotation of an electric motor.
The primary windings of a step-up transformer are usually made of thicker wire than the secondary. Explain.
Which magnet will you use?
Iron is to be separated from trash.
