First slide

Radiation

Question

A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be:

Moderate

A

225
B

450
C

900
D

1800

Solution

P = $σ A T^{4}$
$\frac{P_{2}}{450} = \frac{1 \times 2^{4}}{4}$
$P_{2} = 1800 W$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App