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v_pino
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Homework Statement
A capacitor of capacitance C stores an amount of energy E when the pd across it is V. Which line, A to D, gives the correct energy and pd when the charge is increased by 50%?
Energy pd
A) 1.25E 1.5V
B) 2.25E 1.5V
Homework Equations
E= 0.5 CV^2
E= 0.5 QV
C= Q/V
The Attempt at a Solution
The answer is B).
Do I have to find two simultaneous equations because I have two unknowns? But how?
Thanks :)