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प्रश्न
Define fuse.
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उत्तर
Electric fuse is a safety device which is used in household wiring and in many appliances.
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संबंधित प्रश्न
An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.
Write down the formula for the heat produced when a current I is passed through a resistor R for time t.
The heat produced by passing an electric current through a fixed resistor is proportional to the square of:
(a) magnitude of resistance of the resistor
(b) temperature of the resistor
(c) magnitude of current
(d) time for which current is passed
Explain the importance/uses of fuse wire.
True or False – If False give the correct answer
The fuse wire does not melts whenever there is overload in the wiring.
An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?
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The electric fuse works on the Joule heating principle.
Tara, after completing her exams, went to her grandmother's house along with her younger brother Rahul. One day, Rahul came home after playing and switched on the fan and air conditioner. At the same time, his grandmother was preparing a milkshake for him using a mixer. Suddenly, they heard a big sound and the electricity of the house got shut down. Tara is called an electrician. He said the main reason for supply to shut down was overloading.
- What is overloading?
- Is overloading and short the same? When does short-circuiting take place?
- How can the effects of overloading be avoided?
