EASY
12th West Bengal Board
IMPORTANT
Earn 100

A factory is served by a 220 V power supply line. $\mathrm{In}$ a circuit protected by a fuse marked 10 A, The maximum number of 100 W lamp in parallel that can be turned on is-

50% studentsanswered this correctly

Important Questions on Thermal Effect and Chemical Effect of Current

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 25
A condenser having a capacity 2.0μF is charged to 200 V and then the plates of the capacitor are connected to a resistance wire. The heat produced in Joule will be-
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 26
If 2.2 kW power is transmitted through a 10Ω line at 22000 V, the powerless in the form of heat will be-
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 27
A25 W-220 V bulb and a 100 W-220 V bulb are joined in series and connected to the mains. Which bulb will grow bright ?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 28
In the circuit shown in Fig. 6.19, what will happen to the brightness of the lamps if the resistance of the rheostat Rh is increased?

Question Image

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 29
If two bulbs of 25 W and 30 W, each rated at 220 V, are connected in series with 440 V supply, which bulb will fuse?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 30
Two identical batteries each of e.m.f. 2 V and internal resistance 1 Ω are available to produce heat in an external resistance by passing a current through it. The maximum power that can be developed across R using these batteries is
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 31
Three equal resistors, each of 4Ω, are connected as shown in Fig. 6.20. The maximum power consumed by each resistance is 20Ω. What is the maximum power that can be consumed by the combination?

Question Image

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 32
In the circuit as shown in Fig. 6.21, the heat produced by the 6Ω Resistance is 60 cal s-1.  What heat per second is produced across 3Ω Resistance ?

Question Image