Question

solve this question
Best ans will be brainlist ​

Answer 1

Explanation

Comparing the equation

Ey = 2.5 N/C cos [ ( 2π × 10^6 rad/m ) ] t - ( π>× 10^-2 rad /sec ) x ]

With the standard equation

Ey = Eo cos ( ωt - kx )

ω = 2πf = 2π × 10^6

f = 10^6 Hz

Moreover, we know that

2π / λ = k = π × 10^-2 m^-1

=> λ = 200 m

As direction of field E of electromagnetic wave is in y direction so, the wave is moving along positive X direction with frequency 10^6 Hz and wavelength 200m

∴ Option C is the right answer!

Answer 2

Answer:

a)  y = e^x.sinx On differentiating, we get dy/dx = sinxd/dxe^x

HOPE IT HELPS U !!