TS EAMCET 2023 (Online) 12th May Evening Shift | Electromagnetic Induction Question 19 | Physics

If the vertical component of earth's magnetic field is $0.5 \times 10^{-4} \mathrm{~T}$ at a point. When an aeroplane of wing span 4 m is moving horizontally at this place at $360 \mathrm{kmh}^{-1}$, then the motional emf forced across the ends of the wings is

$20 \times 10^{-4} \mathrm{~V}$

$20 \times 10^{-2} \mathrm{~V}$

$20 \times 10^{-3} \mathrm{~V}$

$2 \times 10^{-4} \mathrm{~V}$

TS EAMCET 2023 (Online) 12th May Evening Shift

MCQ (Single Correct Answer)

-0

A boy is playing with the empty rim of a cycle wheel of radius 40 cm by rolling it along a horizontal road towards north with angular speed of $20 \mathrm{rad} \mathrm{s}^{-1}$. Considering the effect of magnetic field of earth, the e.m.f induced in the rim is

(Horizontal component of earth's magnetic field $=0.26 \mathrm{G}$ )

zero

$2 \mu \mathrm{~V}$

2.4 mV

3 V

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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