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

A rod of circular cross-sectional area A and length $L$ is wound uniformly with $n$ turns of an insulated wire. If current flowing through the windings is I, the total magnetic flux produced inside windings is $\phi$. The relative permeability of the rod is ( $\mathrm{N}=$ number of turns per unit length) $\left(\mu_0=\right.$ permeability of vacuum $)$

A

$\frac{\phi \mathrm{L}}{\mu_0 \mathrm{NIA}}$

B

$\frac{\phi}{\mu_0 \text { INAL }}$

C

$\frac{\mu_0 \mathrm{IAN}}{\phi \mathrm{L}}$

D

$\frac{\mu_0 \mathrm{NA}}{\phi \mathrm{LI}}$

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

In resistance thermometer, the resistance at $0^{\circ} \mathrm{C}$ and $100^{\circ} \mathrm{C}$ are $6.74 \Omega$ and $7.74 \Omega$ respectively. The temperature corresponding to $6.53 \Omega$ resistance is

A

$+53^{\circ} \mathrm{C}$

B

$+21^{\circ} \mathrm{C}$

C

$-53^{\circ} \mathrm{C}$

D

$-21^{\circ} \mathrm{C}$

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

Two bodies A and B have their moments of inertia I and 3I respectively about their axis of rotation. their kinetic energies of rotation are also equal. The ratio of angular momenta of body A to that of body B is

A

$1: 3$

B

$3: 1$

C

$1: \sqrt{3}$

D

$\sqrt{3}: 1$

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

Glass has refractive index ' $n$ ' with respect to air and ' $\theta$ ' is the critical angle for a ray of light going from glass to air. If a ray of light is incident from air on the glass with angle of incidence ' $\theta$ ', corresponding angle of refraction is

A

$\sin ^{-1}\left(\frac{1}{n}\right)$

B

$\quad \sin ^{-1}(\mathrm{n})$

C

$\sin ^{-1}\left(\frac{1}{\mathrm{n}^2}\right)$

D

$\sin ^{-1}\left(\frac{1}{\sqrt{n}}\right)$