1
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The upper end of a wire of diameter $$24 \mathrm{~mm}$$ and length $$1 \mathrm{~m}$$ is damped and its other end is twisted through an angle is $$30^{\circ}$$. The angle of shear is

A
$$18^{\circ}$$
B
$$0.18^{\circ}$$
C
$$36^{\circ}$$
D
$$0.36^{\circ}$$
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

What is the voltage gain in a common emitter amplifier, where input resistance is $$6 \Omega$$ and load resistance $$48 \Omega, \beta=0.3$$ ?

A
8.4
B
4.8
C
2.4
D
480
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

When $${ }_{92} \mathrm{U}^{235}$$ undergoes fission, $$0.1 \%$$ of its original mass is changed into energy. How much energy is released if $$5 \mathrm{Kg}$$ of $${ }_{92} \mathrm{U}^{235}$$ undergoes fission?

A
$$45 \times 10^{10} \mathrm{~J}$$
B
$$45 \times 10^{11} \mathrm{~J}$$
C
$$45 \times 10^{12} \mathrm{~J}$$
D
$$45 \times 10^{13} \mathrm{~J}$$
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

A copper sphere cools from $$82^{\circ} \mathrm{C}$$ to $$50^{\circ} \mathrm{C}$$ in 10 minutes and to $$42^{\circ} \mathrm{C}$$ in the next $$10 \mathrm{~min}$$. Calculate the temperature of the surrounding?

A
$$18.01^{\circ} \mathrm{C}$$
B
$$39.3^{\circ} \mathrm{C}$$
C
$$10.6^{\circ} \mathrm{C}$$
D
$$20^{\circ} \mathrm{C}$$
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