1
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

If $\int_0^a \sqrt{\frac{a-x}{x}} d x=\frac{K}{2}$, then $K=\ldots .$.

A
$\frac{\pi a}{2}$
B
$\frac{5 \pi a}{2}$
C
$\frac{3 \pi a}{2}$
D
$\pi a$
2
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

In $\triangle A B C$; with usual notations, $$\frac{b \sin B-c \sin C}{\sin (B-C)}=\ldots \ldots$$

A
$b$
B
$a+b+c$
C
$a$
D
$c$
3
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

The solution of the differential equation $\frac{d \theta}{d t}=-k\left(\theta-\theta_0\right)$ where $k$ is constant, is .............

A
$\theta=\theta_0+a e^{-k t}$
B
$\theta=\theta_0+a e^{k t}$
C
$\theta=2 \theta_0-a e^{k t}$
D
$\theta=2 \theta_0-a e^{-k t}$
4
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A metal surface is illuminated by light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one fourth of its original value then the maximum KE of the emitted photoelectrons would be

A
twice the original value
B
four times the original value
C
one fourth of the original value
D
unchanged
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