Advertisements
Advertisements
प्रश्न
Answer the following in short.
Name a few common appliances that use electromagnets.
Advertisements
उत्तर
Electric bells, electric motor, telephones, loudspeakers, and generators are few common appliances that use electromagnets.
APPEARS IN
संबंधित प्रश्न
How will you make an iron bar electromagnet? Draw a diagram showing the polarities of the electromagnet?
Tick the most appropriate answer.
Which of the following methods is used to magnetize a magnetic without touching it by a magnet?
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 two properties of the magnetic lines of force around a circular coil.
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
How does a magnetic field set up by a solenoid change when number of turns are increased?
State the factors that can increase the speed of rotation of the coil in a D.C. motor.
What is dynomo (a.c. generator)? State the principle on which it works.
State important properties (or characteristics) of magnetic lines of force around a straight conductor.
What are the factors that govern the magnitude of force acting on a current carrying conductor which is freely suspended in a magnetic field?
