Advertisements
Advertisements
Question
An electric cell produces electricity from the ______ ______ in it.
Advertisements
Solution
An electric cell produces electricity from the chemicals stored in it.
Explanation:
An electric cell converts chemical energy stored in its chemicals (usually through a chemical reaction between the electrolyte and the electrodes) into electrical energy. This energy is then used to power electrical devices connected to the cell.
APPEARS IN
RELATED QUESTIONS
Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?
Explain why, the current that makes the heater element very hot, only slightly warms the connecting wires leading to the heater.
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.
Which electric heating device in your home do you think have resistors which control the flow of electricity?
Give a scientific reason:
For electric power transmission, copper or aluminium wire is used.
Explain the importance/uses of fuse wire.
Name any two appliances which work under the principle of heating effect of current.
A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of:
What is a trip switch?
An electric kettle of 2 kW is used for 2h. Calculate the energy consumed in
- kilowatt hour and
- joules.
