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

A simple pendulum of length $$I$$ has a bob of mass $$m$$. It executes SHM of small amplitude A. The maximum tension in the string is ($$g=$$ acceleration due to gravity)

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

A block of mass $$m$$ attached to one end of the vertical spring produces extension $$x$$. If the block is pulled and released, the periodic time of oscillation is

A
$$2 \pi \sqrt{\frac{x}{4 g}}$$
B
$$2 \pi \sqrt{\frac{2 x}{g}}$$
C
$$2 \pi \sqrt{\frac{x}{2 g}}$$
D
$$2 \pi \sqrt{\frac{x}{g}}$$
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

The resultant of two vector $$\mathbf{A}$$ and $$\mathbf{B}$$ is $$\mathbf{C}$$. If the magnitude of $$\mathbf{B}$$ is doubled, the new resultant vector becomes perpendicular to A. Then, the magnitude of $$\mathbf{C}$$ is

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

A ray of light travelling through glass of refractive index $$\sqrt{2}$$ is incident on glass-air boundary at an angle of incidence $$45^{\circ}$$. If refractive index of air is 1 , then the angle of refraction will be $$\left[\sin 45^{\circ}=\frac{1}{\sqrt{2}}, \sin 90^{\circ}=1\right]$$

A
$$45^{\circ}$$
B
$$30^{\circ}$$
C
$$60^{\circ}$$
D
$$90^{\circ}$$
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