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
1 calorie = _________ joule.
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?
An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours?
(a) Rs 12
(b) Rs 24
(c) Rs 36
(d) Rs 48
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
Tick(✓) the correct choice in the following:
In the circuit shown in the following fig, the e.m.f. of the cell is 4 volts, the current
flowing through the resistor is
Of the three connecting wires in a household circuit: Which two of the three wires are at the same potential? In which of the three wires should the switch be connected?
At what voltage is the electric power generated at the generating station? Explain the transmission of this power to your house.
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the resistance of its filament while glowing.
The average work done by a human heart while it beats once is 0.5 Joule. The power used by heart if it beats 72 times in a minute:
