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

A wire of length ' $L$ ' and area of cross section ' $A$ ' is made of material of Young's modulus ' $r$. It is stretched by an amount ' $x$ '. The work done in stretching the wire is

A
$\frac{Y x^2 A}{2 L}$
B
$\frac{2 Y x^2 A}{L}$
C
$\frac{Y \times A}{2 L}$
D
$\frac{Y x^2 A}{2}$
2
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a parallel plate air capacitor the distance between plates is reduced to one fourth and the space between them is filled with a dielectric medium of constant 2 . If the initial capacity of the capacitor is $4 \mu \mathrm{~F}$. then its new capacity is

A
$32 \mu \mathrm{~F}$
B
$18 \mu \mathrm{~F}$
C
$8 \mu \mathrm{~F}$
D
$44 \mu \mathrm{~F}$
3
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An aircraft is moving with uniform velocity $150 \mathrm{~m} / \mathrm{s}$ in the space. If all the forces acting on it are balanced, then it will

A
keep moving with same velocity
B
remain floating at its place
C
escape in space
D
fall down on earth
4
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In case of $p$-n junction diode, the width of depletion region is

A
decreased with heavy doping
B
increased by reverse biasing
C
decreased with light doping
D
increased by forward biasing
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