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

There are four convex lenses $$L_1, L_2, L_3$$ and $$L_4$$ of focal length $$2,4,6$$ and 8 cm, respectively. Two of these lenses from a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are respectively

A
$$L_1, L_2$$
B
$$L_1, L_4$$
C
$$L_2, L_3$$
D
$$L_4, L_1$$
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of radii of gyration of a ring to a disc (both circular) of same radii and mass, about a tangential axis perpendicular to the plane is

A
$$\frac{\sqrt{3}}{\sqrt{2}}$$
B
$$\frac{2}{\sqrt{5}}$$
C
$$\frac{\sqrt{2}}{1}$$
D
$$\frac{2}{\sqrt{3}}$$
3
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
$$2: 1$$
4
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
$$r\left(\frac{\alpha \theta}{2}\right)^{\frac{1}{2}}$$
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