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The diagram above shows two capacitors P and Q of capacitance 2μF and 4μF respectively...

Physics
JAMB 2001
The diagram above shows two capacitors P and Q of capacitance 2μF and 4μF respectively connected to a d.c source. The ratio of energy stored in P to Q is
  • A. 4:1
  • B. 2:1
  • C. 1:4
  • D. 1:2
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Correct Answer: Option D
Explanation
Energy = 1/2CV2
∴Energy of P = 1/2 x 2 x V2 = V2
Energy of Q = 1/2 x 4 x V2 = 2V2
∴ P/Q = V2/2V2 = 1/2 => P:Q = 1:2

There is an explanation video available below.

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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