1
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic field at the centre of a current carrying circular coil of area ' $A$ ' is ' $B$ '. The magnetic moment of the coil is ( $\mu_0=$. permeability of free space)

A
$\frac{2 B}{\mu_0} \sqrt{\frac{A^3}{\pi}}$
B
$\frac{\mathrm{BA}^2}{4 \mu_0 \pi}$
C
$\frac{2 \pi}{\mu_0} \sqrt{A^3}$
D
$\frac{\mu_0}{2 B} \sqrt{\frac{A^3}{\pi}}$
2
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A parallel combination of two capacitors of capacities ' C ' and ' $\frac{\mathrm{C}}{3}$, respectively is connected across a battery of 12 volt. When both capacitors are fully charged, the charge and energy stored in them is $Q_1, Q_2$ and $E_1, E_2$ respectively. Then the ratio of $\left(E_1-E_2\right)$ to $\left(Q_1-Q_2\right)$ is

A
$1: 8$
B
$1: 6$
C
$8: 1$
D
$6: 1$
3
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A transparent sphere of refractive index ' $\mu$ ' and radius of curvature ' $R$ ' is kept in air. A point object is placed at a distance ' d ' from the surface of the sphere so that the real image is formed at the same distance ' $d$ ' from exactly opposite side of the sphere. The distance ' $d$ ' is

A
$\frac{\mu}{R}$
B
$\mathrm{R}(\mu-1)$
C
$\frac{\mathrm{R}}{(\mu-1)}$
D
$\frac{\mathrm{R}}{(\mu+1)}$
4
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

The instantaneous value of current in an a.c. circuit is $I=2 \sin \left[100 \pi t+\frac{\pi}{3}\right]$ A. The current will be maximum for the first time at $\left(\sin 90^{\circ}=1\right)$

A
$\frac{1}{100} \mathrm{~s}$
B
$\frac{1}{200} \mathrm{~s}$
C
$\frac{1}{400} \mathrm{~s}$
D
$\frac{1}{600} \mathrm{~s}$
EXAM MAP