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प्रश्न
Unscramble the following words:
SFEU
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उत्तर
FUSE
APPEARS IN
संबंधित प्रश्न
Give two reasons why nichrome alloy is used for making the heating elements of electrical appliances.
Why does the connecting cord of an electric heater not glow hot while the heating element does?
The electrical resistivities of four materials P, Q, R and S are given below:
| P | `6.84xx10^8`Ωm |
| Q | `1.70xx10^8`Ωm |
| R | ` 1.0xx10^15`Ωm |
| s | `11.0xx10^-7`Ωm |
Which material will you use for making: (a) heating element of electric iron (b) connecting wires of electric iron (c) covering of connecting wires? Give reason for your choice in each case.
Answer the following question:
what is the heating effect of the electric current? state any four applications of it?
These days when current in the circuit suddenly increases _______ switches are used.
Name any two appliances which work under the principle of heating effect of current.
Which of the following is correct?
What is an electric fuse made up of?
Assertion: A current-carrying wire should be charged.
Reason: The current in a wire is due to the flow of free electrons in a definite direction.
An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?
