JEE Main 2017PhysicsNuclear PhysicsMediumMCQ

JEE Main 2017 — Nuclear Physics Question with Solution

JEE Main 2017 (09 Apr Online)

Question

Imagine that a reactor converts all the given mass into energy and that it operates at a power level of 109 Watt . The mass of the fuel consumed per hour, in the reactor, will be:
(velocity of light, c is 3×108 m s-1)

Choose an option

Show full solutionCorrect option: C
Correct answer
C4×10-2 g

Step-by-step explanation

Power of reactor, P=EΔt=Δmc2Δt(From mass-energy equivalence equation) 

Given in the problem power level =109 Watt .

∆m∆t=Pc2 =1093×1082

⇒ ∆m∆t=10-79 kg s-1 

The mass of fuel consumed per hour=10-79×1000 g3600 h-1=4×10-2 g h-1.

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About this question

This is a previous-year question from JEE Main 2017, covering the Nuclear Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.