Physics, asked by abc252, 1 year ago

two lamps 'a' rated 100 watt 220 and b rated 60 watt 220v are connected in series to b electric main supply of 220v. the ratio of the heat produced in lamp a to the lamp b

Answers

Answered by Meghna5371
1

Answer:

Option A

Explanation:

Supply voltage, V=220V

Lamp A :-

Power , P

A

=100W

Voltage, V

A

=220V

Resistance, R

A

=

P

A

V

2

=

100

220

2

=484Ohm

Lamp B:-

Power, P

B

=60W

Voltage, V

B

=200V

Resistance, R

B

=

P

B

V

2

=

60

220

2

=

6

4840

Ohm

Ratio of heat produced ,

H

B

H

A

=

I

2

∗R

B

I

2

∗R

A

=

4840/6

484

=

10

6

=

5

3

(Current will be same as both are in series)

Hence ratio of heat produced in the lamps A and B is 3:5.

Option A

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