Question

4. Which circuit would have less current in it? S.
9. Calculate the cost of operating a heater of 500 W for 20 hours at the rate of Rs. 3.90 per
10. Which has a greater resistance, a 100 watt bulb or a 60 watt bulb?
11. How much energy is consumed when a current of 5 amperes flows through the filament
element) of a heater having resistance of 100 ohms for two hours? Express it in joules.
12. An electric bulb is rated at 220 V, 100 W. What is its resistance?
13 An electric bulb is connected to a 220 V power supply.If it draws I = 0.5 A, Calculate P
14. In which of the following cases more electrical energy is consumed per hour?
. A current of 1 ampere passed through a resistance of 300 ohms
A current of 2 amperes passed through a resistance of 100 ohms.
15. Eléctric kettle rated at 220 V, 2.2 kW, works for 3 hours. Find he energy consumed ar
current drawn.
16/In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for
every day. Calculate the electric energy consumed in 30 days.
17. If the potential difference between the ends of a wire of fixed resistance is doubled,
much does the electric power increase?
18. A bulb is rated as 250 V; 0.4 A. Find its: (i) power, and (ii) resistance.
19. For a heater rated at 4 kW and 220 V, calculate (a) the current, b) the resistance of
c) the energy consumed in 2 hours, and d) the cost if 1 kWh is priced at Rs. 4.60
.
20. An electric motor takes 5 amperes current from a 220 volt supply line. Calculate the
the motor arid electrical energy consumed by it in 2 hours.
21. Which uses more energy: a 250 W TV set in 1 hour or a 1200 W Toaster in 10 min
22. An electric bulb is rated as 10 W, 220 V. How many of these bulbs can be connec
parallel across the two wires of 220 V supply line if the max. current which can be dra
23. How much work is done in moving a charge of 2C from a point at 118v to a point
24. What possible values of resultant resistance one can get by combining two resist
of value 2 ohm and the other 6 ohm?
anontod in orallel what will be their totalri
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Answer 1

Answer:

0

Explanation: