Capacitor is a device used to, store electrical energy, vary the resistance, store magnetic energy, dissipate energy, The units of capacitance are, Volts/coulomb, Henry/wb, Coulombs/volt, Ohms, The capacitance of a capacitor is not affected by, Distance between plates, Area of plates, Thickness of plates, All of the above, Three capacitors each of the capacity C are given. The resultant capacity of 2/3 C can be obtained by using them, All in series, All in parallel, Two in series and third in parallel across this combination, C. Two in parallel and third in the series with this combination, A capacitor consists of, A. Two insulators separated by a conductor, B. Two conductors separated by an insulator, C. Two insulators only, D. Two conductors only, A capacitor having a capacitance of 40 μF is connected across a 250 V DC source. The charging current will be least, When capacitor is fully charged, When capacitor is have charged 50%, When capacitor is almost 25% charged, None of the above, Which of the following depends on the charging and discharging rate of a capacitor?, Time constant, Current, Power, Voltage, What is the initial current while charging a capacitor?, Low, 0, Cannot be determined, High, What is the final current while charging a capacitor?, Low, 0, Cannot be determined, High, The capacitance C is charged through a resistor R. The time constant of the charging circuit is given by, R/C, RC, C/R, 1/RC, In a capacitor, the electric charge is stored in, Metal plates, Dielectric, Metal plates and dielectric, None of the above, If the dielectric of a capacitor is replaced by a conducting material, The capacitance value of the capacitor will shoot up to very high value, The capacitor can store infinite charge, The plates will get short-circuited, The capacitor will get heated up due to eddy currents, When the dielectric is inserted into the capacitor which is disconnected from the battery., charges increase, potential difference across the capacitor decrease, capacitance decreasecapacitance decrease, charges remain unchanged

Physic Sem2 Chapter 2

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