TG EAPCET 2024 (Online) 9th May Evening Shift | Electromagnetic Induction Question 4 | Physics

A train with an axle of length 1.66 m is moving towards north with a speed of $90 \mathrm{kmh}^{-1}$. If the vertical component of the earth's magnetic field is $0.2 \times 10^{-4} \mathrm{~T}$, the emf induced across the ends of the axle of the train is

16.6 mV

1.66 mV

0.83 mV

8.3 mV

TG EAPCET 2024 (Online) 9th May Morning Shift

MCQ (Single Correct Answer)

-0

Two circular coils of radii $r_1$ and $r_2\left(r_1 \ll r_2\right)$ are placed coaxially with their centres coinciding. The mutual inductance of the arrangement is

$\frac{\mu_0 \pi \pi_2^2}{2 r_1}$

$\frac{\mu_0 \pi r_1 r_2}{2\left(r_1+r_2\right)}$

$\frac{\mu_0 \pi r_1^2}{2 r_2}$

$\frac{\mu_0 \pi\left(r_1+r_2\right)}{2 r_1 r_2}$

TS EAMCET 2023 (Online) 12th May Morning Shift

MCQ (Single Correct Answer)

-0

When a current $i$ through a solenoid is increasing at a constant rate, then the induced current is

constant and it will be in the direction of $i$

constant and it will be in a direction opposite to the $i$

increased with time and it will be in the direction of $i$

increased with time and opposite to the direction of $i$

TS EAMCET 2023 (Online) 12th May Morning Shift

MCQ (Single Correct Answer)

-0

In a pair of adjacent coils, if the current in one coil changes from 10 A to 2 A in a time 0.2 s , an emf of 120 V is induced in another coil. The mutual inductance of the pair of the coils is

2 H

3 H

6 H

9 H

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