Question

assertion three lamps connected in series will create more heat than three lamps connected in parallel
reason series combination results in larger resistance
​

Answer 1

Answer:

Both A and R are true, and R is correct explanation of the assertion.

Explanation:

This is because the formula for resistance in series circuit is --->>> R=R1+ R2 + R3 and

while formula for parallel is  --->>> 1/R= 1/R1 + 1/R2.

So naturally,series will have more resistance. And more resistance means more heat because more electrical energy would be converted to heat energy while passing through a conductor with higher resisatnce.

Answer 2

The complete question is:-

Assertion: Three lamps connected in series will create more heat than three lamps connected in parallel

Reason: Series combination results in larger resistance .

Choose the correct option:

(a) Both assertion and reason are true and reason is the correct explanation of the assertion.

(b) Both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) Assertion is true but the reason is false.

(d) Both Assertion and Reason are false.

Answer:-

Both assertion and reason are true and reason is the correct explanation of the assertion (Option a)

• ​When (n) resistors are connected in series, the resultant is R₁ +R + R₃...Rₙ
• When they are connected in parallel, the effective resistance is 1/R₁ + 1/R₂ + 1/R₃...1/Rₙ
• Therefore the effective resistance is greater in series than in parallel.
• Resistance converts the light energy into heat energy; thus the series combination will create more heat.