1

JEE Main 2021 (Online) 26th August Evening Shift

Numerical

+4

-1

If the maximum value of accelerating potential provided by a ratio frequency oscillator is 12 kV. The number of revolution made by a proton in a cyclotron to achieve one sixth of the speed of light is ...............

[m

[m

_{p}= 1.67 $$\times$$ 10^{$$-$$27}kg, e = 1.6 $$\times$$ 10^{$$-$$19}^{}C, Speed of light = 3 $$\times$$ 10^{8}m/s]Your input ____

2

JEE Main 2021 (Online) 26th August Evening Shift

Numerical

+4

-1

A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s

^{$$-$$1}in a uniform horizontal magnetic field of 3.0 $$\times$$ 10^{$$-$$2}T. The maximum emf induced the coil will be ................. $$\times$$ 10^{$$-$$2}volt (rounded off to the nearest integer)Your input ____

3

JEE Main 2021 (Online) 27th July Evening Shift

Numerical

+4

-1

In the given figure the magnetic flux through the loop increases according to the relation $$\phi$$

The magnitude of current through R = 2$$\Omega$$ resistor at t = 5 s is ___________ mA.

_{B}(t) = 10t^{2}+ 20t, where $$\phi$$_{B}is in milliwebers and t is in seconds.The magnitude of current through R = 2$$\Omega$$ resistor at t = 5 s is ___________ mA.

Your input ____

4

JEE Main 2021 (Online) 25th July Morning Shift

Numerical

+4

-1

A circular conducting coil of radius 1 m is being heated by the change of magnetic field $$\overrightarrow B $$ passing perpendicular to the plane in which the coil is laid. The resistance of the coil is 2 $$\mu$$$$\Omega$$. The magnetic field is slowly switched off such that its magnitude changes in time as

$$B = {4 \over \pi } \times {10^{ - 3}}T\left( {1 - {t \over {100}}} \right)$$

The energy dissipated by the coil before the magnetic field is switched off completely is E = ___________ mJ.

$$B = {4 \over \pi } \times {10^{ - 3}}T\left( {1 - {t \over {100}}} \right)$$

The energy dissipated by the coil before the magnetic field is switched off completely is E = ___________ mJ.

Your input ____

Questions Asked from Electromagnetic Induction (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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