MHT CET 2024 11th May Morning Shift | Moving Charges and Magnetism Question 14 | Physics

A boat is moving due east in a region where the earth's magnetic field is $3.6 \times 10^{-5} \mathrm{~N} / \mathrm{Am}$ due north and horizontal. The boat carries a vertical conducting rod 2 m long. If the speed of the boat is $2.00 \mathrm{~m} / \mathrm{s}$, the magnitude of the induced e.m.f. in the rod is

1.4 mV

0.72 mV

0.54 mV

0.144 mV

MHT CET 2024 11th May Morning Shift

MCQ (Single Correct Answer)

-0

The magnetic flux near the axis and inside the air core solenoid of length 80 cm carrying current ' I ' is $1.57 \times 10^{-6} \mathrm{~Wb}$. Its magnetic moment will be [cross-sectional area of a solenoid is very small as compared to its length, $\mu_0=4 \pi \times 10^{-7}$ SI unit $](\pi=3.14)$

$0.25 \mathrm{~Am}^2$

$0.50 \mathrm{~Am}^2$

$1 \mathrm{~Am}^2$

$1.2 \mathrm{~Am}^2$

MHT CET 2024 11th May Morning Shift

MCQ (Single Correct Answer)

-0

Two long straight parallel wires are separated by a distance '2d'. Each wire carries a current 'I' in the same direction. The magnetic field at a point 'P' midway between them is

$\frac{2 \mu_0 I}{r}$

zero

$\frac{\mu_0 I}{4 r}$

$\frac{\mu_0 I}{2 r}$

MHT CET 2024 10th May Evening Shift

MCQ (Single Correct Answer)

-0

The magnitude of magnetic field at point 'O' in the following figure will be

MHT CET 2024 10th May Evening Shift Physics - Moving Charges and Magnetism Question 15 English

$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(\frac{2}{\pi}+2\right)$

$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(\frac{2}{\pi}-2\right)$

$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(2+\frac{\pi}{2}\right)$

$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(2-\frac{\pi}{2}\right)$

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