solve all When a capacitor is connected across a battery of 8V, its capacitance

Question

solve all

When a capacitor is connected across a battery of 8V, its capacitance is measured to be C, if it is connected across a battery of 4V; its capacitance is During a lighting.a car acts like a faraday cage because the car is: an insulating enclosure to block out electric fields an insulating enclosure to block out electric potential a conducting enclosure to block out electric fields 3 conducting enclosure to block out electric potential insulated from the ground by rubber tires changing Q. the new value of the voltage is . unchanged reduced by half double quadrupled Reduced by a factor of four

Explanation / Answer

apply Q = CV

so C1v1 = C2v2

C2 = C* 8/4 = 2C

option A

b. A conducting enclousure to bloxk out side Electric fields

c. apply C = Q/V = eo A/d

or VA = constnat

V1A1 = V2A2

V2 = 12* A*2/A

V2 = 24 Volts

option C

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