1
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A charged conductor produces an electric field of intensity $10^3 \mathrm{~V} / \mathrm{m}$ just outside its surface in vacuum. Then, it produces the electric field of intensity E just outside its surface, when it is placed in a medium of dielectric constant 4. The value of $E$ will be

A
$400 \mathrm{~V} / \mathrm{m}$
B
$450 \mathrm{~V} / \mathrm{m}$
C
$250 \mathrm{~V} / \mathrm{m}$
D
$150 \mathrm{~V} / \mathrm{m}$
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In damped SHM, the SI unit of damping constant is

A
$\frac{\mathrm{N}}{\mathrm{s}}$
B
$\frac{\mathrm{kg}}{\mathrm{s}}$
C
$\frac{\mathrm{kg}}{\mathrm{m}}$
D
$\frac{N}{m}$
3
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A wire of length $L$ and radius $r$ is rigidly fixed at one end. On stretching the other end of the wire with a force $F$, the increase in length is $I$. If another wire of the same material but double the length and radius is stretched with a force $2 F$, then increase in length is

A
$\frac{l}{4}$
B
$2l$
C
$\frac{l}{2}$
D
$l$
4
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When certain metal surface is illuminated with a light of wavelength $\lambda$, the stopping potential is $V$, When the same surface is illuminated by light of wavelength $2 \lambda$, the stopping potential is $\left(\frac{V}{3}\right)$. The threshold wavelength for the surface is

A
$\frac{8 \lambda}{3}$
B
$\frac{4 \lambda}{3}$
C
$4 \lambda$
D
$6 \lambda$
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