Advertisements
Advertisements
प्रश्न
Why is an electric fuse required in all electrical appliances?
Advertisements
उत्तर
An electric fuse is required in all electrical appliances because it is a safety device and checks the excessive flow of electric current.
APPEARS IN
संबंधित प्रश्न
Three resistors of resistances R1 , R2 and R3 are connected (i) in series, and (ii) in parallel. Write expressions for the equivalent resistance of the combination in each case.
Two identical resistros of `12 Omega` each are connected to a battery of 3V . Calculate the ratio of the power consumed by the resulting combinations with minimum resistance and maximum resistance.
Match the following
| 1. | Cell | used to open or close a circuit |
| 2. | Switch | safety device used in electric circuit |
| 3. | Circuit | A complete path for the flow of an electric current |
| 4. | Miniature circuit Breaker | Reset by hand, circuit becomes complete once again |
| 5. | Fuse | A device which converts chemical energy into electrical energy |
Length: metre scale: : Current: ______
A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure. The current recorded in the ammeter will be
 |
 |
 |
| (i) | (ii) | (iii) |
Electrical resistivity of a given metallic wire depends upon
Which property of a conducting wire is utilised in making electric fuse?
Why are compact fluorescent lamps (CFLs) preferred over electric bulbs?
Electricity produced on rubbing is ______.
Choose from the options a, b, c and d given in the following figure which shows the correct direction of current.
