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प्रश्न
State the law that explains the heating effect of current with respect to the measurable properties in an electrical circuit.
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उत्तर
Joule's law of heating states that the heat dissipated across a resistor is directly proportional to:
- The square of the current flowing through it.
- The resistance of the conductor.
- Duration of the flow of current.
H = `"I"^2 "Rt"`
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संबंधित प्रश्न
Why does the cord of an electric heater not glow while the heating element does?
How does the resistance of a wire vary with its:
diameter?
How much heat will an instrument of 12 W produce in one minute if it is connected to the heat produced by it?
Name the material which is used for making the filaments of an electric bulb.
The elements of electrical heating devices are usually made of:
(a) tungsten
(b) bronze
(c) nichrome
(d) argon
What is the heating effect of electric current?
Explain the heating effect of electric current.
A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of:
When a switch is in OFF position,
- circuit starting from the positive terminal of the cell stops at the switch.
- circuit is open.
- no current flows through it.
- current flows after some time.
Choose the combination of correct answer from the following.
Name two electric devices for each where
- heating effect of current is used and
- magnetic effect of current is used.
