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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 two ways of magnetising an iron piece?
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?
What is an electric motor?
State the two properties of the magnetic lines of force around a circular coil.
A straight current-carrying conductor is kept in a magnetic field. It Experiences a force. State three factors on which the magnitude of force Experienced by the conductor depends. Under what condition will the conductor Experience no force?
Why is soft iron generally used as the core of the electromagnet?
What is dynomo (a.c. generator)? State the principle on which it works.
The primary windings of a step-up transformer are usually made of thicker wire than the secondary. Explain.
State the function of a split ring in D.C. motor.
