Advertisements
Advertisements
प्रश्न
An electric cell produces electricity from the ______ ______ in it.
Advertisements
उत्तर
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
संबंधित प्रश्न
Two exactly similar heating resistances are connected (i) in series, and (ii) in parallel, in two different circuits, one by one. If the same current is passed through both the combinations, is more heat obtained per minute when they are connected in series or when they are connected in parallel? Give reason for your answer.
Give a scientific reason:
For electric power transmission, copper or aluminium wire is used.
An electric iron of 1100 W is operated for 2 hrs daily. What will be the electrical consumption expenses for that in the month of April? (The electric company charges Rs 5 per unit of energy).
Live wire and neutral wires have a 220 V potential difference.
Name any two appliances which works on the phenomenon of heating effect of electric current.
How does use of a fuse wire protect electrical appliances?
Can we use the same fuse in a geyser and a television set? Explain.
Name the effect of the current responsible for the glow of the bulb in an electrical circuit.
A student boils water in an electric kettle for 20 minutes. Using the same mains supply he wants to reduce the boiling time of water. To do so should he increase or decrease the length of the heating element? Justify your answer.
In a set up the students coated iron nails with zinc metal and noted that, iron nails coated with zinc prevents rusting. They also observed that zinc initially acts as a physical barrier, but an extra advantage of using zinc is that it continues to prevent rusting even if the layer of zinc is damaged. Name this process of rust prevention and give any two other methods to prevent rusting.
