ICSE Class 10 Physics 2020 Solved Paper

Question : 22

Total: 67

Two metallic blocks P and Q having masses in ratio 2:1 are supplied with same amount of heat. If their temperature rise by same degree, compare their specific heat capacities.

Solution:

Given :
‌

‌ Mass of block ‌P(mp)

‌ Mass of block ‌Q(mQ)

‌=‌

and ∆Tp‌=∆TQ
‌

‌=?
Heat supplied to block P= Heat supplied to block Q
∴‌‌mp⋅Cp⋅∆Tp‌=mQ⋅CQ∆TQ‌‌ (∵Q=mc∆T)
⇒‌‌‌

‌=‌

×‌

∆TQ

∆Tp

‌‌ (∵∆TQ=∆TP)
‌=‌

×‌

=1:2.‌‌‌ Ans. ‌

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