1
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

When the ideal monoatomic gas is heated at constant pressure fraction of heat energy supplied which increases the internal energy of gas is

A

$\frac{2}{5}$

B

$\frac{3}{5}$

C

$\frac{3}{7}$

D

$\frac{3}{4}$

2
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Two identical long solid cylinders are used to conduct heat from temperature $T_1$ to temperature $T_2$. Originally, the cylinders are connected in series and the rate of heat transfer is $H$. If the cylinders are connected in parallel, then the rate of heat transfer will be

A

$\frac{\mathrm{H}}{4}$

B

2 H

C

4 H

D

8 H

3
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

In the fusion reaction,

$$ { }_1^2 \mathrm{H}+{ }_1^2 \mathrm{H} \longrightarrow{ }_2^3 \mathrm{He}+{ }_0^1 \mathrm{n} $$

the masses of deuteron, helium and neutron expressed in amu are 2.015, 3.017 and 1.009, respectively. If 1 kg of deuterium undergoes complete fusion, then find the amount of total energy released. ( $1 \mathrm{amu}=9315 \mathrm{MeV}$ )

A

$9 \times 10^{13} \mathrm{~J}$

B

$20 \times 10^5 \mathrm{~J}$

C

$4 \times 10^{22} \mathrm{~J}$

D

$5 \times 10^{15} \mathrm{~J}$

4
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

A steel wire of mass 4 g and length 80 cm is fixed at the two ends. The tension in the wire is 50 N , then the frequency of fourth harmonic is

A

250 Hz

B

500 Hz

C

700 Hz

D

1000 Hz

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