1
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

A projectile is launched vertically from the earth with speed $$v_1$$ hits a satellite at the height $$h$$ moving with speed $$v_2$$. If both have the same mass $$m$$, then what is the common velocity if they move together after the collision?

A
$$v_1+v_2$$
B
$$\sqrt{v_1^2+v_2^2}$$
C
$$\frac{\sqrt{v_1^2+v_2^2}}{2}$$
D
$$2 \sqrt{v_1^2+v_2^2}$$
2
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

A cone filled with water is revolved in a vertical circle of radius $$4 \mathrm{~m}$$ and the water does not fall down. What must be the maximum period of revolution?

A
2s
B
4s
C
1s
D
6s
3
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Consider a rod of mass $$M$$ and length $$L$$ pivoted at its centre free to rotate in a vertical plane. The rod is at rest in the vertical position. A bullet of mass $$M$$ moving horizontal at a speed $$v$$ strikes and gets embedded in one end of the rod. The angular velocity of the rod just after the collision will be

A
$$v / L$$
B
$$2 v / 2 L$$
C
$$3 v / L$$
D
$$6 v / L$$
4
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

In a cathode ray tube, a potential difference of 3000 volts is maintained between the deflector plates whose separation is $$2 \mathrm{~cm}$$. A magnetic field of $$2.5 \times 10^{-3} \mathrm{~Wb} / \mathrm{m}^2$$ at right angles to electric field gives no deflection of the electron beam, which received an initial acceleration by a potential difference of $$10000 \mathrm{~V}$$. Calculate $$(\mathrm{e} / \mathrm{m})$$ of an electron.

A
$$1.8 \times 10^{11} \mathrm{C} / \mathrm{kg}$$
B
$$4.2 \times 10^{11} \mathrm{C} / \mathrm{kg}$$
C
$$1.76 \times 10^{11} \mathrm{C} / \mathrm{kg}$$
D
None of these
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