Advertisements
Advertisements
प्रश्न
State three factors on which the heat produced in a metallic wire due to passage of current in it depends.
Advertisements
उत्तर
(i) On resistance of wire.
(ii) On strength of current through the wire.
(iii) On time for which the current flows in the wire.
संबंधित प्रश्न
Which particles are responsible for current in conductors?
State two factors on which the electrical energy consumed by an electrical appliance depends.
What is the meaning of the symbol kWh? Which quantity does it represent?
In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours everyday. Calculate the electric consumed in 30 days.
A 2 kWh heater, a 200 W TV and three 100 W lamps are all switched on from 6 p.m. to 10 p.m. What is the total cost at Rs 5.50 per kWh?
Why is a concave reflector placed behind the heating element in a room heater.
What is the function of the split rings in a d.c. motor?
State other bigger units of electric power and express them in watt.
A bulb is connected to a battery of e.m.f. 6V and internal resistance 2Ω A steady current of 0.5A flows through the bulb. Calculate the resistance of the bulb.
A cooler of 1500 W, 200 volts and a fan of 500 W, 200 volts are to be used from a household supply. The rating of fuse to be used is:
