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

The light of wavelength $$\lambda$$ incident on the surface of metal having work function $$\phi$$ emits the electrons. The maximum velocity of electrons emitted is [ $$c=$$ velocity of light, $$h=$$ Planck's constant, $$m=$$ mass of electron]

A
$$\left[\frac{2(h v-\phi) \lambda}{m c}\right]$$
B
$$\left[\frac{2(h c-\lambda \phi)}{m \lambda}\right]^{1 / 2}$$
C
$$\left[\frac{2(h c-\lambda)}{m \lambda}\right]^{1 / 2}$$
D
$$\left[\frac{2(h c-\phi)}{m \lambda}\right]$$
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A thin light weight rod of diamagnetic substance such as silver is suspended in uniform external magnetic field. It will align itself with its length

A
parallel to magnetic field
B
perpendicular to magnetic field
C
inclined at an angle $$45^{\circ}$$ to magnetic field
D
inclined at an angle $$120^{\circ}$$ to magnetic field
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A batsman hits a ball of mass 0.2 kg straight towards the bowler without changing its initial speed of $$6 \mathrm{~m} / \mathrm{s}$$. What is the impulse imparted to the ball?

A
3.2 N-s
B
1.6 N-s
C
4 N-s
D
2.4 N-s
4
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
$$L_4, L_1$$
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