1. Define capacitance. The ability of an electric circuit or component to store electric energy by means by means of an electrostatic field. 2. Compare between an inductor and a capacitor the manner in which energy is stored. The capacitor stores energy in an electrostatic field, the inductor stores energy in a magnetic field. 3.
the initial capacitor voltage. Answer: 10 V. the capacitor voltage after the switch has been open a very long time. Answer: 7.5 V the capacitor voltage after 0.2 s. Answer: 7.84 V. Identify which of the following circuits are first order RL circuits. Yes Yes Find the time constant for the following circuits;
A student is learning about how capacitors work. He uses the circuit shown in Figure 1 to investigate the capacitor C. Letter X labels a connection which he can make to either of the points L or M. Each cell has an e.m.f. of 1.5 V. He connects X to L. He sketches how the reading on ammeter 1 varies with time (Figure 2).
Explanation: The unit for inductance is ‘Henry’ and capacitance is ‘Faraday’. 8. The voltage applied to a pure capacitor of 50*10 -6 F is as shown in figure. Calculate the current for 0-1msec. 9. If a capacitor of capacitance 9.2F has a voltage of 22.5V across it. Calculate the energy of the capacitor.
The capacitor stores energy in an electrostatic field, the inductor stores energy in a magnetic field. 3. Common practical applications for capacitors list four. 1. Power factor correction of an electrical system. 2. Improving torque in motors. 3. Filters in AC circuits. 4. Timing of control circuits 4.
13. An Inductor works as a ___________ circuit for DC supply. Explanation: Induced voltage across an inductor is zero if the current flowing through it is constant. I.e. Inductor works as a short circuit for DC supply.