Related InterviewSolutions

• A multiple plate capacitor has 10 plates, each of area 10 square cm and separation between 2 plates is 1 mm with air as dielectric. Determine the energy stored when voltage of 100 volts is applied across the capacitor.
• Three capacitors of 2 μ F, 5 μ F and 10 μ F have breakdown voltage of 200 V, 500 V and 100 V respectively. The capacitors are connected in series and the applied direct voltage to the circuit is gradually increased. Which capacitor will breakdown first ? Determine the total applied voltage and total energy stored at the point of breakdown.
• Device used to store energy in electrical circuits is A. resistor B. inductor C. capacitor D. diode
• The voltage across a 5microF capacitor change uniformly from 10 to 70V in 5ms. Calculate the change in capacitor charge and charging current.
• A resistance R and a 4 μF capacitor are connected in series across a 200 V. d.c. supply. Across the capacitor is a neon lamp that strikes (glows) at 120 V. Calculate the value of R to make the lamp strike (glow) 5 seconds after the switch has been closed.
• A parallel-plate capacitor is made of plates 1 m square and has a separation of 1 mm. The space between the plates is filled with dielectric of εr = 25.0. If 1 k V potential difference is applied to the plates, find the force squeezing the plates together
• Work done in charging a capacitor is given by A. (1⁄2)QV B. 2QV C. QV D. 2V
• Energy stored in a 2000 mF capacitor charged to a potential difference of 10 V is A. 0.12 J B. 1.3 J C. 0.10 J D. 3 J
• Capacitor is fully charged if potential difference is equal to A. e.m.f B. current C. resistance D. power
• Total capacitance of 300 mF capacitor and a 600 mF in series isA. 300 mF B. 500 mF C. 200 mF D. 1000 mF