1
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A conducting rod of length $$1 \mathrm{~m}$$ has area of cross-section $$10^{-3} \mathrm{~m}^2$$. One end is immersed in baiting water $$\left(100^{\circ} \mathrm{C}\right)$$ and the other end in Ice $$\left(0^{\circ} \mathrm{C}\right)$$. If coefficient of thermal conductivity of $$\mathrm{rod}$$ is $$96 \mathrm{~cal} / \mathrm{sm}^{\circ} \mathrm{C}$$ and latent heat for ice is $$8 \times 10^{-4} \mathrm{cal} / \mathrm{kg}$$ then the amount of ice which will melt in one minute is

A
$$5.4 \times 10^{-3} \mathrm{~kg}$$
B
$$7.2 \times 10^{-3} \mathrm{~kg}$$
C
$$1.8 \times 10^{-3} \mathrm{~kg}$$
D
$$3.6 \times 0^{-3} \mathrm{~kg}$$
2
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following statements is true?

A
The sound waves in air are longitudinal while the light waves in air are transverse.
B
Both light and sound waves in air are transverse.
C
Both light and sound waves in air are longitudinal.
D
The sound waves are transverse and light waves are longitudinal.
3
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A particle executes S.H.M. of period $$\frac{2 \pi}{\sqrt{3}}$$ second along a straight line $$4 \mathrm{~cm}$$ long. The displacement of the particle at which the velocity is numerically equal to the acceleration is

A
$$2 \mathrm{~cm}$$
B
$$1 \mathrm{~cm}$$
C
$$4 \mathrm{~cm}$$
D
$$3 \mathrm{~cm}$$
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two consecutive harmonics of an air column in a pipe closed at one end are of frequencies 150 Hz and 250 Hz. The fundamental frequency of an air column is

A
25 Hz
B
75 Hz
C
100 Hz
D
50 Hz
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