1
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

An open organ pipe and a closed organ pipe have the frequency of their first overtone identical. The ratio of length of open pipe to that of closed pipe is

A
$$1: 2$$
B
$$3: 4$$
C
$$4: 3$$
D
$$2: 1$$
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A particle starting from rest moves along the circumference of a circle of radius $$r$$ with angular acceleration $$\alpha$$. The magnitude of the average velocity, in the time it completes the small angular displacement $$\theta$$ is

A
$$r\left(\frac{2}{\alpha \theta}\right)^2$$
B
$$r\left(\frac{\alpha \theta}{2}\right)^2$$
C
$$\rho\left(\frac{\alpha \theta}{2}\right)$$
D
$$r\left(\frac{\alpha \theta}{2}\right)^{\frac{1}{2}}$$
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two spherical black bodies of radius $$r_1$$ and $$r_2$$ with surface temperature $$T_1$$ and $$T_2$$ respectively, radiate same power, then $$r_1: r_2$$ is

A
$$\left(\frac{T_2}{T_1}\right)^4$$
B
$$\left(\frac{T_2}{T_1}\right)^2$$
C
$$\left(\frac{T_1}{T_2}\right)^2$$
D
$$\left(\frac{T_1}{T_2}\right)^4$$
4
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following instruments is not a direct reading instrument?

A
Electronic balance
B
Potentiometer
C
Ammeter
D
Voltmeter
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