1

JEE Main 2021 (Online) 31st August Morning Shift

Numerical

+4

-1

The electric field in an electromagnetic wave is given by E = (50 NC

The energy contained in a cylinder of volume V is 5.5 $$\times$$ 10

^{$$-$$1}) sin$$\omega$$ (t $$-$$ x/c)The energy contained in a cylinder of volume V is 5.5 $$\times$$ 10

^{$$-$$12}J. The value of V is _____________ cm^{3}. (given $$\in$$_{0}= 8.8 $$\times$$ 10^{$$-$$12}C^{2}N^{$$-$$1}m^{$$-$$2})Your input ____

2

JEE Main 2021 (Online) 27th August Evening Shift

Numerical

+4

-1

A plane electromagnetic wave with frequency of 30 MHz travels in free space. At particular point in space and time, electric field is 6 V/m. The magnetic field at this point will be x $$\times$$ 10

^{$$-$$8}T. The value of x is ___________.Your input ____

3

JEE Main 2021 (Online) 26th August Morning Shift

Numerical

+4

-1

The electric field in a plane electromagnetic wave is given by

$$\overrightarrow E = 200\cos \left[ {\left( {{{0.5 \times {{10}^3}} \over m}} \right)x - \left( {1.5 \times {{10}^{11}}{{rad} \over s} \times t} \right)} \right]{V \over m}\widehat j$$. If this wave falls normally on a perfectly reflecting surface having an area of 100 cm

$$\overrightarrow E = 200\cos \left[ {\left( {{{0.5 \times {{10}^3}} \over m}} \right)x - \left( {1.5 \times {{10}^{11}}{{rad} \over s} \times t} \right)} \right]{V \over m}\widehat j$$. If this wave falls normally on a perfectly reflecting surface having an area of 100 cm

^{2}. If the radiation pressure exerted by the E.M. wave on the surface during a 10 minute exposure is $${x \over {{{10}^9}}}{N \over {{m^2}}}$$. Find the value of x .Your input ____

4

JEE Main 2021 (Online) 17th March Evening Shift

Numerical

+4

-1

The electric field intensity produced by the radiation coming from a 100 W bulb at a distance of 3 m is E. The electric field intensity produced by the radiation coming from 60W at the same distance is $$\sqrt {{x \over 5}} $$E. Where the value of x = ____________.

Your input ____

Questions Asked from Electromagnetic Waves (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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