1
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An air cored coil has self inductance of 0.1 H . A soft iron core of relative permeability 1000 is introduced and the number of turns is reduced to $\left(\frac{1}{10}\right)^{\text {th }}$. The value of self inductance is now

A
0.1 H
B
1 mH
C
1 H
D
10 mH
2
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

$\mathrm{L}=2 \mathrm{H}, \mathrm{C}=5 \mathrm{mF}$ and $\mathrm{R}=12 \Omega$ are connected in series to an a.c. generator of frequency 50 Hz . Then

A
at resonance, impedance of the circuit is zero.
B
at resonance, impedance of the circuit is $12 \Omega$.
C
the resonant frequency of the circuit is $1 / 2 \pi$.
D
the inductive reactance is less than the capacitive reactance.
3
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An electron of stationary Hydrogen atom passes from fifth energy level to ground level. The velocity that the atom acquired as a result of photo emission is

( $\mathrm{m}=$ mass of electron, $\mathrm{R}=$ Rydberg's constant)

( $\mathrm{h}=$ Planck's constant)

A
$\frac{24 \mathrm{Rh}}{25 \mathrm{~m}}$
B
$\frac{25 \mathrm{Rh}}{24 \mathrm{~m}}$
C
$\frac{25 \mathrm{~m}}{24 \mathrm{Rh}}$
D
$\frac{24 \mathrm{~m}}{25 \mathrm{Rh}}$
4
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A diffraction pattern is obtained using a beam of red light. If red light is replaced by blue light then

A
no change in diffraction pattern.
B
diffraction bands become narrow and crowded together.
C
diffraction bands become broader and farther apart.
D
bands disappear.
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