99 Percentile Qs Bank for JEE MainPhysicsThermal Properties of Matter
Two rods of the same length and material transfer a given amount of heat in 12 s , when they are joined end to end, i.e. in series. When they are joined in parallel, they will transfer the same heat under the same conditions in
Options
- A24 s
- B3 s
- C48 s
- D1.5 s
Correct answer
B. 3 s
Step-by-step solution
∆ t = ∆ Q ∆ x KA ∆ T When two rods of same length are joined in parallel, A → 2 and ∆ x → 1 2 times ∴ ∆ t becomes 1 4 times i . e . , 1 4 × 12 s = 3 s