01․ The resistance of 100 W, 200 V lamp is
Where, V is supply voltage and W is wattage rating of the lamp. Here, wattage of the lamp W = 100 W, and supply voltage V = 200 Volts.
02․ Purpose of using capacitor is / are
Purposes of using capacitors are 1. Increasing p.f. of inductive load circuit. 2. To do phase split in AC 1 phase motor. 3. Effect DC filter in electronic circuit. 4. Also helps in tuning in radio and TV sets.
03․ The unit of capacitance is
A farad (F) is the SI derived unit of capacitance. A capacitor of one farad produces a potential difference of one volt between its plates when it stores an electric charge of one coulomb.
04․ What will be the capacitance when distance between the 2 plates of a condenser of capacitance 8 micro farad is reduced from 10 mm to 4 mm?
Where, A is common area of conductor plates and d is the distance between two conductor plates.
05․ The capacitance of a conductor is varying from 2 microfarad to zero in 1 sec linearly if the voltage applied to it is 6 V the energy stored in 0.5 sec in the condenser is
06․ A 50 μF capacitor is charged to retain 10 MJ of energy by a constant charging current of 1 A. Determine the voltages across the capacitor?
Where v being the voltage developed across the capacitor of capacitance(C).
07․ A p.d. of 300 V is applied across series combination of 3 μF and 9 μF capacitors. The charge on each capacitor is ___________________ μC.
08․ A capacitor that stores charge of 0.5 C at 10 V has a capacitance of _____________ farad.
09․ A capacitor has a capacitance of 6 μF. Calculate the stored energy in it if a DC voltage of 100 V, is applied across it?
10․ Ceq of two capacitors connected in series is given by
Series combination of capacitors is same as parallel combination of resistance.