Advertisements
Advertisements
प्रश्न
Name two safety devices which are connected to the live wire of a household electric circuit
Advertisements
उत्तर
Fuse, MCB Switch
APPEARS IN
संबंधित प्रश्न
How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s
A current passes through a resistor. Let K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions, respectively.
Fig . shows the essent ial features of a battery operated bell. The hammer strikes the gong when the swi tch is closed . State and explain the effect of using the following material successively to form the core.
(a) Plastic
(b) Steel
(c) Copper
Mention three uses of the carbon arc.
Why is the heating element of an electric oven wound on a helix? State the reason.
An electric heater is rated 220 V, 550 W. What does this statement mean?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the resistance of each heater.
Find the heat produced in joules when a current of 10 amperes flows through a connecting wire of resistance 2 × 10-2 ohms and heating element of resistance 250 ohms for 2 seconds.
Unit of electric power may also be expressed as:
