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प्रश्न
What will be the effect on the working of an electric bell if instead of a direct current an alternating current is used?
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उत्तर
If electric bell is connected to a.c. instead of d.c. then bell will ring intermittently.
संबंधित प्रश्न
State three uses of an electromagnet?
What is an electric motor?
principle of an electric motor ?
State two factors on which the strength of induced e. m.f. depends.
A straight wire is held vertical and current is passed in it in the upward direction. A compass needle is kept near the wire in north of it. How is the needle deflected? What is the change in the deflection of the needle if the current in wire is reversed?
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
What is a permanent magnet? Give one use of it.
What energy conversion takes place during the working of a d c motor?
State the principle of a D. C. motor.
State the function of a split ring in D.C. motor.
