Quiz: Time Constant

TIME CONSTANT

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1. A-001-001-001.... What is the meaning of the term "time constant" in an RL circuit?

the time required for the current in the circuit to build up to 36.8 percent of the maximum value
the time required for the voltage in the circuit to build up to 63.2 percent of the maximum value
the time required for the voltage in the circuit to build up to 36.8 percent of the maximum value
the time required for the current in the circuit to build up to 63.2 percent of the maximum value
No Answer

2. A-001-001-002.... What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2 percent of the supply voltage?

an exponential rate of one
one time constant
a time factor of one
one exponential period
No Answer

3. A-001-001-003.... What is the term for the time required for the current in an RL circuit to build up to 63.2 percent of the maximum value?

one time constant
an exponential period of one
a time factor of one
one exponential rate
No Answer

4. A-001-001-004.... What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8 percent of its initial value of stored charge?

a discharge factor of one
an exponential discharge of one
one time constant
one discharge period
No Answer

5. A-001-001-005.... What is meant by "back EMF" ?

a current that opposes the applied EMF
a voltage that opposes the applied EMF
an opposing EMF equal to R times C percent of the applied EMF
a current equal to the applied EMF
No Answer

6. A-001-001-006.... After two time constants, the capacitor in an RC circuit is charged to what percentage of the supply voltage?

63.2 percent
86.5 percent
95 percent
36.8 percent
No Answer

7. A-001-001-007.... After two time constants, the capacitor in an RC circuit is discharged to what percentage of the starting voltage?

13.5 percent
36.8 percent
86.5 percent
63.2 percent
No Answer

8. A-001-001-008.... What is the time constant of a circuit having a 100 microfarad capacitor in series with a 470 kilohm resistor?

4700 seconds
470 seconds
0.47 seconds
47 seconds
No Answer

9. A-001-001-009.... What is the time constant of a circuit having a 470 microfarad capacitor in series with a 470 kilohm resistor?

221 000 seconds
47 000 seconds
221 seconds
470 seconds
No Answer

10. A-001-001-010.... What is time constant of a circuit having a 220 microfarad capacitor in series with a 470 kilohm resistor?

470 000 seconds
470 seconds
103 seconds
220 seconds
No Answer

Points out of 10:

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