EASY

JEE Advanced

IMPORTANT

Earn 100

An electric immersion heater of $1.08 k W$ is immersed in water. After it has reached a temperature of $100 ° C$ , how much time will be required to produce $100 g$ of steam? $(1 Cal = 4.2 J)$

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Important Questions on Heating Effects of Current

EASY

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 29

Two electric bulbs

A

and

B

are rated

60 W

and

100 W

, respectively. If they are connected in parallel to the same source, then,

EASY

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 30

25 W, 220 V

bulb and a

100 W, 220 V

bulb are connected in series across a

220 V

line. Which electric bulb glows more brightly?

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 31

Two identical heaters rated

220 V, 1000 W

are placed in series with each other across

220 V

line, then the combined power is

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 32

The figure shows three similar lamps

L_{1}, L_{2}

and

L_{3}

connected across a power supply. If the lamp

L_{3}

fuses, how will the light emitted by

L_{1}

and

L_{2}

change?

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 33

If a wire of resistance

20 Ω

is covered with ice and a voltage of

210 V

is applied across the wire, then the rate of melting of ice is

(L_{ice} = 80 cal g^{- 1})

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 34

A factory is served by a

220 V

supply line. In a circuit protected by a fuse marked

10 A

, the maximum number of

100 W

lamps in parallel that can be turned on is

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 35

It takes

16

\min

to boil some water in an electric kettle. Due to some defect, it becomes necessary to remove

10 %

turns of the heating coil of the kettle. After repairs, how much time will it take to boil the same mass of water?

EASY

JEE Advanced

IMPORTANT

PHYSICS for Joint Entrance Examination JEE (Advanced) Electrostatics and Current Electricity>Chapter 7 - Heating Effects of Current>Exercise>Q 36

100 W

bulb designed to operate on

100 V

is connected across a

500 V

source. Find the resistance to put in series so that bulb consumes

100 W

only.

An electric immersion heater of 1.08 kW is immersed in water. After it has reached a temperature of 100°C, how much time will be required to produce 100 g of steam? 1 Cal=4.2 J

Important Questions on Heating Effects of Current

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An electric immersion heater of $1.08 k W$ is immersed in water. After it has reached a temperature of $100 ° C$ , how much time will be required to produce $100 g$ of steam? $(1 Cal = 4.2 J)$