NEET Physics Thermodynamics Questions Solved

NEET - 2016

 

The temperature inside a refrigerator is t2C and the room temperature is t1C . The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be -

(a)t1t1-t2      (b) t1+273t1-t2

(c) t2+273t1-t2    (d) t1+t2t1+273

 

(b) For a refrigerator, we know that 

             Q1W=Q1Q1-Q2=T1T1-T2

where,

Q1=amount of heat delivered to the room

W = electrical energy consumed

T1= room temperature= t1+273

T2=temperature of sink=t2+273

   Q11=t1+273t1+273-t2+273

Q1=t1+273t1-t2

Difficulty Level:

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