1
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A bob of a simple pendulum has mass $m$ and is oscillating with an amplitude $a$. If the length of the pendulum is $L$, then the maximum tension in the string is $\left[\cos 0^{\circ}=1\right.$, $g=$ acceleration due to gravity]

A
$m g\left[1+\left(\frac{a}{L}\right)^2\right]$
B
$m g\left[1-\left(\frac{L}{a}\right)^2\right]$
C
$m g\left[1+\left(\frac{L}{a}\right)^2\right]$
D
$m g\left[1-\left(\frac{a}{L}\right)^2\right]$
2
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

The Brewster's angle for the glass-air interface is $(54.74)^{\circ}$. If a ray of light passing from air to glass strickes at an angle of incidence $45^{\circ}$, then the angle of refraction is

$$\left[\tan (54.74)^{\circ}=\sqrt{2}, \sin 45=\frac{1}{\sqrt{2}}\right]$$

A
$\sin ^{-1}(\sqrt{2})$
B
$\sin ^{-1}(1)$
C
$\sin ^{-1}(05)$
D
$\sin ^{-1}\left(\frac{1}{\sqrt{2}}\right)$
3
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

For a paramagnetic substance, the magnetic susceptibility is

A
large and negative
B
small and positive
C
large and positive
D
small and negative
4
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

Let $x=\pi R\left(\frac{P^2-Q^2}{2}\right)$, where $P, Q$ and $R$ are lengths. The physical quantity $x$ is

A
area
B
length
C
volume
D
velocity
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