MHT CET 2023 12th May Evening Shift | Electromagnetic Induction Question 87 | Physics

An air craft of wing span $$40 \mathrm{~m}$$ files horizontally in earth's magnetic field $$5 \times 10^{-5} \mathrm{~T}$$ at a speed of $$500 \mathrm{~m} / \mathrm{s}$$. The e.m.f. generated between the tips of the wings of the air craft is

0.5 V

1 V

1.2 V

1.5 V

MHT CET 2023 12th May Evening Shift

MCQ (Single Correct Answer)

-0

Inductance per unit length near the middle of a long solenoid is $$\left(\mu_0=\right.$$ permeability of free space, $$\mathrm{n}=$$ number of turns per unit length, $$\mathrm{d}=$$ the diameter of the solenoid)

$$\mu_0 \pi\left(\frac{\mathrm{nd}}{2}\right)^2$$

$$4 \mu_0 \pi\left(\frac{\mathrm{nd}}{2}\right)$$

$$\left(\frac{\mu_0 \pi n d}{2}\right)$$

$$\frac{4 \mu_0 \pi}{\mathrm{n}^2 \mathrm{~d}^2}$$

MHT CET 2023 12th May Morning Shift

MCQ (Single Correct Answer)

-0

Two inductors of $$60 \mathrm{~mH}$$ each are joined in parallel. The current passing through this combination is $$2.2 \mathrm{~A}$$. The energy stored in this combination of inductors in joule is

0.0333

0.0667

0.0726

0.0984

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