1
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A particle is suspended from a vertical spring which is executing S.H.M. of frequency $$5 \mathrm{~Hz}$$. The spring is unstretched at the highest point of oscillation. Maximum speed of the particle is $$(\mathrm{g} =10 \mathrm{~m} / \mathrm{s}^2)$$

A
$$\frac{1}{\pi} \mathrm{m} / \mathrm{s}$$
B
$$\frac{1}{4 \pi} \mathrm{m} / \mathrm{s}$$
C
$$\frac{1}{2 \pi} \mathrm{m} / \mathrm{s}$$
D
$$ \pi~ \mathrm{m} / \mathrm{s}$$
2
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Photoelectrons are emitted when photons of energy $$4.2 ~\mathrm{eV}$$ are incident on a photosensitive metallic sphere of radius $$10 \mathrm{~cm}$$ and work function $$2.4 ~\mathrm{eV}$$. The number of photoelectrons emitted before the emission is stopped is

$$\left[\frac{1}{4 \pi \epsilon_0}=9 \times 10^9\right.$$ SI unit; $$\left.\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}\right]$$

A
$$1.25 \times 10^6$$
B
$$1.25 \times 10^2$$
C
$$1.25 \times 10^8$$
D
$$1.25 \times 10^4$$
3
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A cricket player hit a ball like a projectile but the fielder caught the ball after 2 second. The maximum height reached by a ball is (g = 10 m/s2)

A
2 m
B
5 m
C
4 m
D
3 m
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In an ideal step down transformer, out of the following quantities, which quantity increases in the secondary coil?

A
Power
B
Voltage
C
Current
D
Frequency
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