Advertisements
Advertisements
प्रश्न
What is ‘Rating’ of an electric appliance?
Advertisements
उत्तर
Rating of an electric appliance indicates energy consumed per second or watt when connected to a supply of given voltage.
संबंधित प्रश्न
Which quantity has the unit of watt?
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
The coil of an electric bulb takes 40 watts to start glowing. If more than 40 W are supplied, 60% of the extra power is converted into light and the remaining into heat. The bulb consumes 100 W at 220 V. Find the percentage drop in the light intensity at a point if the supply voltage changes from 220 V to 200 V.
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

What are the two main systems of wiring commonly used in houses? Which of these systems mentioned by you is better and why?
Mention three uses of the carbon arc.
An electric heater is rated 220 V, 550 W. Calculate the electrical energy consumed in 3 hours?
An electric bulb is rated 240V-60W and is working at 100% efficiency.
(i) Calculate the resistance of bulb.
(ii) (a) Draw the circuit diagram.
(b) What is the rate of conversion of energy in each bulb?
(c) Total power used by the bulbs.
1 mV is equal to:
In the given figure, the emf of the cell is 2.2 V, and if internal resistance is 0.6 Ω. Calculate the power dissipated in the whole circuit.

