Asked in MDCAT Test Series — Electrostatics, Work and Energy

Time constant is defined as the time required by the capacitor:

Correct answer: A. To deposit 63% of the equilibrium charge

  • A. To deposit 63% of the equilibrium charge
  • B. To deposit 36% of the equilibrium charge
  • C. To deposit 63 times of the equilibrium charge
  • D. To deposit 36 times of the equilibrium charge

Explanation

q = q°(1-e-t/RC), in the equation RC is the time constant which denotes the time it takes for "63.2% of the charge to be deposited" on the plates of the capacitor q° is the maximum charge, t is the amount of time charged, and q is the charge on the plates, e = 2.718.

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About Capacitors

Capacitors store electric charge and energy in an electric field between conductors. Work includes capacitance, the relation Q = CV, dielectric materials, charging and discharging, energy formulas, and combinations of capacitors in series and parallel. Electric potential difference is needed to understand why charge and stored energy change.

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