Question

5.2
322
222
13. In the adjoining circuit, find
(a) total resistance of the circuit.
(b) ammeter (A) reading
(c) voltmeter (V) reading.
14. In the adjoining circuit, find
(a) total resistance of the circuit
(b) current through 512 resistor
(c) potential difference across 20 S2 resistor.
15. A household uses the following electric appliances:
(1) Refrigerator of rating 400w for ten hours each day.
(11) Two electric fans of rating 80W each for twelve hours
each day.
(iii) Six electric tubes of rating 18W cach for 6 hours each
day.
10V
Fig. Q. 13
30 V
5 S2
10 22
Calcute the electricy bill of the houschold for the month
of June if the cost per unit of electric cnergy is Rs.3.00.
16. An electric heater is connected to a 220 V generator. The
10 12
20 12
current is 4 A. What is the power of the electric heater?
17. A bulb is rated as 100 W at 220 V. What is the resistance
Fig. Q. 14
of this bulb.
18. Calculate the energy consumed by a 2 kW electric heater in 2 hours. Express the result in joules.
19. A potential difference of 250 V is applied across a resistance of 1000 12. Calculate the heat
energy produced in the resistance in 10 seconds.
20. Three equal resistors connected in series across a battery together dissipate 10 W power. What
will be the power dissipated if the same resistors are connected in parallel across the same battery?​

Answer 1

Answer:

13- total resistance of the circuit

14 b

15 1