1
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In an extrinsic n-type semiconductor, the free electrons donated by the impurity atoms occupy energy levels in

A
the conduction band.
B
the valance band.
C
the band gap and are close to conduction band.
D
the band gap and are close to valance band.
2
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the angular velocity of a body rotating about the given axis increases by $20 \%$, then its kinetic energy of rotation will increase by

A
$20 \%$
B
$30 \%$
C
$44 \%$
D
$66 \%$
3
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two progressive waves $Y_1=\sin 2 \pi\left(\frac{t}{0 \cdot 4}-\frac{x}{4}\right)$ and $Y_2=\sin 2 \pi\left(\frac{t}{0 \cdot 4}+\frac{x}{4}\right)$ superpose to form a standing wave. ' $x$ ' and ' $y$ ' are in SI system. Amplitude of the particle at $x=0.5 \mathrm{~m}$ is $\left[\sin 45^{\circ}=\cos 45^{\circ}=\frac{1}{\sqrt{2}}\right]$

A
$\sqrt{3} \mathrm{~m}$
B
$3 \sqrt{3} \mathrm{~m}$
C
$\sqrt{2} \mathrm{~m}$
D
$2 \sqrt{2} \mathrm{~m}$
4
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The strength of magnetic field at a perpendicular distance ' $x$ ' near a long straight conductor carrying current ' I ' is ' B '. The magnetic field at a distance $\frac{x}{3}$ from straight conductor will be

A
$\frac{\mathrm{B}}{3}$
B
 3 B
C
$\frac{\mathrm{B}^2}{9}$
D
$9 \mathrm{~B}^2$
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