TS EAMCET 4 May 2018 Shift 1 Solved Paper

The intensity of radiations is calculated as,
I=

Power

Area

× Efficiency
=

100

4×π×103

×η
Half of intensity is provided by electric field and another half by magnetic field.

1

2

I=

1

2

ε0Emax2c
=

1

2

ε0

Emax2

2

c
The efficiency is calculated as,

100

4π×103

η=

1

2

×8.85×10−12×

4

2

×3×108
η=

8.85×2×3×1256×10−4

100

η=

6.66

100

η=6.66%