1
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

At a height 'R' above the earth's surface the gravitational acceleration is (R = radius of earth, g = acceleration due to gravity on earth's surface)

A
g
B
$$\frac{\mathrm{g}}{8}$$
C
$$\frac{g}{4}$$
D
$$\frac{g}{2}$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two rings of radius 'R' and 'nR' made of same material have the ratio of moment of inertia about an axis passing through its centre and perpendicular to the plane is $$1: 8$$. The value of '$$n$$' is (mass per unit length $$=\lambda$$)

A
2
B
4
C
1
D
3
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

'$$n$$' waves are produced on a string in 1 second. When the radius of the string is doubled, keeping tension same, the number of waves produced in 1 second for the same harmonic will be

A
$$2 \mathrm{n}$$
B
$$\frac{\mathrm{n}}{2}$$
C
$$\frac{\mathrm{n}}{\sqrt{2}}$$
D
$$\sqrt{2} \mathrm{n}$$
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

the magnetic flux (in weber) in a closed circuit of resistance $$20 \Omega$$ varies with time $$t$$ second according to equation $$\phi=5 t^2-6 t+9$$. The magnitude of induced current at $$t=0.2$$ second is

A
0.8 A
B
1 A
C
0.2 A
D
0.4 A
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