1
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A light spring is suspended with mass $$m_1$$ at its lower end and its upper end fixed to a rigid support. The mass is pulled down a short distance and then released. The period of oscillation is $$T$$ second. When a mass $$m_2$$ is added to $$m_1$$ and the system is made to oscillate, the period is found to be $$\frac{3}{2} T$$. The ratio $$m_1: m_2$$ is

A
$$2: 3$$
B
$$3: 4$$
C
$$4: 5$$
D
$$5: 6$$
2
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The molecular mass of a gas having r.m.s. speed four times as that of another gas having molecular mass 32 is

A
2
B
4
C
16
D
32
3
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The position '$$x$$' of a particle varies with a time as $$x=a t^2-b t^3$$ where '$$a$$' and '$$b$$' are constants. The acceleration of the particle will be zero at

A
$$\frac{2 \mathrm{a}}{3 \mathrm{~b}}$$
B
$$\frac{\mathrm{a}}{\mathrm{b}}$$
C
$$\frac{a}{3 b}$$
D
zero
4
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When the conductivity of a semiconductor is only due to the breaking of the covalent bonds, the semiconductor is called

A
donor
B
intrinsic
C
acceptor
D
extrinsic
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