Electronics-Capacitor Question and Answer
Electronics-Capacitor Question and Answer
1. After which time constant can a capacitor be considered to be fully charged?
- first
- third
- fifth
- seventh
2. You could increase the time constant of an RC circuit by
- adding a resistor in parallel with the circuit resistance
- adding a capacitor in parallel with the circuit capacitance
- increasing the amplitude of the input voltage
- exchanging the position of the resistor and capacitor in the circuit
3. A capacitor's rate of charge is considered:
- magnetic
- a current block
- linear
- exponential
4. A resistor and an output capacitor form a series circuit with a square wave applied. The circuit is:
- an integrator
- a differentiator
- a multiplier
- a divider
5. If an open capacitor is checked with an ohmmeter, the needle will:
- stay on zero
- stay on infinity
- move from zero to infinity
- move from infinity to zero
6. As a capacitor is being charged, current flowing into the capacitor will:
- increase
- decrease
- remain the same
- cannot tell
7. A capacitor stores energy within a dielectric between the conducting plates in the form of:
- a magnetic field
- positive voltage
- negative voltage
- an electric field
8. As a capacitor is being charged, the voltage across its terminals will:
- increase
- decrease
- remain the same
- oppose the source
9. After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?
- 63.2
- 36.8
- 13.5
- 5.0
10. If a current of 40 mA flows through a series circuit consisting of a 0.4 F capacitor and a resistor in series with a 4 kHz, 40 Vac source, what is the total circuit impedance?
- 10 omega.gif
- 100 omega.gif
- 1 k omega.gif
- 1 M omega.gif