Advertisements
Advertisements
प्रश्न
Which of the following precautions need not be taken while using electric gadgets/appliances/circuit?
विकल्प
We should never touch a lighted electric bulb connected to the mains.
We should never experiment with the electric supply from the mains or a generator or an inverter.
We should never use just any wire or strip of metal in place of a fuse.
We should never turn the switch in ON position.
Advertisements
उत्तर
We should never turn the switch in ON position.
Explanation:
Precautions that need to be taken:
-
Never touch a lighted electric bulb connected to the mains: This is dangerous as the bulb and its connections may be live, leading to an electric shock.
-
Never experiment with the electric supply from the mains, generator or inverter: Doing so can cause electric shocks, short circuits or even fire hazards.
-
Never use just any wire or strip of metal in place of a fuse: A fuse is designed to protect the circuit from overloads. Using improper materials can lead to fire hazards or damage to electrical components.
APPEARS IN
संबंधित प्रश्न
One unit of coulomb is charge of approximately ______ protons or electrons.
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 |
Explain the construction and working of an Telephone.
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
Name the effect of current responsible for the glow of the bulb in an electric circuit.
Which property of a conducting wire is utilised in making electric fuse?
Why are compact fluorescent lamps (CFLs) preferred over electric bulbs?
A tiny particle that rotates around the nucleus of an atom is ______.
In an electric bulb, light is produced due to the glowing of ______.
