NEET | 2017Work, Power and EnergyHard
Question
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be :-
Options
A.
450
B.
1000
C.
1800
D.
225
More Work, Power and Energy Questions
Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in...The graph between and is (EK = kinetic energy and p = momentum) −...The power of a pump which can pump 200 kg of water to a height of 200 m in 10s is (g = 10 m/s2):-...An inductor 20 mH, a capacitor 100 μF and a resistor 50Ω are connected in series across a source of emf, V = 10 ...A wind - power generator converts wind energy into electric energy. Assume that the generator converts a fix friction of...