MEDIUM

JEE Advanced

IMPORTANT

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A $500 W$ heater is designed to operate at $200 V$ potential difference. If it is connected across $160 V$ line, find the heat (in $k J$ ) it will produce in $20 \min$ .

Important Questions on Heating Effects of Current

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 11

A storage battery with emf

E = 2.6 V

loaded with and external resistance produces a current

I = 1.0 A

. In this case, the potential difference between the terminals of the storage battery equals

V = 2.0 V

. Find the ratio of the thermal power generated in the battery to the power supplied by the battery.

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 12

A battery of emf

ε

fitted with a resistor

R

in series supplies current to the resistors between

A

and

B

in the upper part of the circuit. If the power dissipated in the network between

A

and

B

as shown by rounded dotted line does not get affected by closing the key

K

, find the value of

R

(in

Ω

) if

R^{'} = 20 \sqrt{2}

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 13

In the circuit shown in figure, a capacitor of capacitance $5 µ F$ is connected to a source of constant emf of $200 V$ . Then the switch was shifted to contact $2$ from contact $1$ . Find the amount of heat generated in the $400 Ω$ resistance in $m J$ .
Question Image

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 14

Five identical bulbs rated as

100 W, 250 V

are connected as shown in the figure with a battery of emf

ε = 260 V

and internal resistance

20 Ω

. Find power loss in the bulb

A

watts

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 15

20 V

battery with an internal resistance of

5 Ω

is connected to a resistor of

x Ω

. If an additional

6 Ω

resistor is connected across the battery, find the value of

x

Ω

, so that external power supplied by the battery remains the same.

EASY

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Archives>Q 1

Two electric bulbs marked

25 W - 220 V

and

100 W - 220 V

are connected in series to a

440 V

supply. Which of the bulbs will fuse?

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Archives>Q 2

The supply voltage to a room is

120 V

. The resistance of the lead wires is

6 Ω

. A

60 W

bulb is already switched on. What is the decrease of voltage across the bulb, when a

240 W

heater is switched on in parallel to the bulb?

EASY

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Archives>Q 3

In a large building, there are

15

bulbs of

40 W

5

bulbs of

100 W

5

fans of

80 W

and

1

heater of

1 kW

. The voltage of the electric mains is

220 V

. The minimum capacity of the main fuse of the building will be

A 500 W heater is designed to operate at 200 V potential difference. If it is connected across 160 V line, find the heat (in kJ) it will produce in 20 min.

Important Questions on Heating Effects of Current

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A $500 W$ heater is designed to operate at $200 V$ potential difference. If it is connected across $160 V$ line, find the heat (in $k J$ ) it will produce in $20 \min$ .