1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Young's modulus of the material of wires X and Y are in the ratio 4:1 and the areas of cross sections of the wires X and Y are in the ratio $2: 1$. If the same amount of load is applied to both the wires, the ratio of elongation produced in the wires X and Y will be: (Assume length of the wires X and Y initially are the same)
A
$1: 8$
B
$1: 1$
C
$8: 1$
D
$1: 2$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
A force of $-\mathrm{F} \hat{\mathbf{i}}$ acts at the origin of the coordinate system. The torque about the point $(0,1,-1)$ is:
A
$F(\hat{\jmath}+\hat{\mathrm{k}})$
B
$-F(\hat{\jmath}+\mathrm{k})$
C
$F(\hat{\mathrm{i}}+\mathrm{k})$
D
$-F(\hat{\imath}+\hat{\jmath})$
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

A sample of an ideal gas is taken through the cyclic process ABCA as shown in figure below. It absorbs 60 J of heat during the part AB and rejects 80 J of heat during CA . There is no heat exchanged during the process $\mathrm{BC} . \mathrm{A}$ work of 40 J is done on the gas during the part BC . If the internal energy of the gas at A is 1450 J , then the work done by the gas during the part CA is:

COMEDK 2025 Morning Shift Physics - Heat and Thermodynamics Question 1 English

A
10J
B
20J
C
40J
D
30J
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