1
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A wave is travelling in the negative x direction having displacement 3 cm along Y direction, wavelength $2 \pi \mathrm{~m}$ and frequency $\left(\frac{1}{2 \pi}\right) \mathrm{Hz}$ is represented as ( $t=$ time)

A

$3 \sin (\mathrm{x}+\mathrm{t}) \mathrm{m}$

B

$3 \times 10^{-2} \sin (x+t) m$

C

$3 \sin (x+2 t) m$

D

$3 \times 10^{-3} \sin (x+2 t) \mathrm{m}$

2
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A straight wire of mass ' M ' and length 2 m is placed in a magnetic field of 2 T which is acting perpendicular to the length of the wire. When a current of 1 A flows through the wire, the wire experiences an upthrust and leviates in a magnetic field. The mass ' $M$ ' of the wire is (acceleration due to gravity $\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$ )

A

0.4 gram

B

40 gram

C

400 gram

D

0.04 gram

3
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A photon and an electron have equal energy ' $E$ '. The ratio of wavelength of photon to wavelength of electron is proportional to

A

$\frac{1}{\mathrm{E}}$

B

$\sqrt{E}$

C

E

D

$\frac{1}{\sqrt{\mathrm{E}}}$

4
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A passenger is sitting in a train which is moving fast. The engine blows a whistle of frequency ' n '. If the apparent frequency of sound heard by the passenger is $n^1$ then

A

$\mathrm{n}^1 \leq \mathrm{n}$

B

n $^1<$ n

C

$n^1>n$

D

$n^1=n$