Q no. 35
Ans. is A
Explain

Q no. 35 Ans. is A Explain Conduction 35. Diagram shows a heat source 'S' and three position of heat recover (hand). The main made of heat transfer is given as 'a', 'b' & 'c'. Choose the correct matching :- (A) a — conduction ; b — convection ; c — radiation (B) b — conduction ; a — convection ; c— radiation (C) a — conduction ; c — convection ; b — radiation D) c — conduction ; b — radiation ; a— convection

Dear student,
Option A is correct.
For convection the heat waves travel  perpendicularly upwards, so b is convection
The rod has to be touched to the fire to heat it so its conduction.so a is conduction, and c is radiation, as the heat is travelling as waves.
While conduction is the transfer of heat energy by direct contact, convection is the movement of heat by actual motion of matter; radiation is the transfer of energy with the help of electromagnetic waves

regards

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