A-001-01: Time constant - capacitive and inductive
A-001-01-01:
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 63.2% of the maximum value
The time required for the current in the circuit to build up to 36.8% of the maximum value
The time required for the voltage in the circuit to build up to 63.2% of the maximum value
The time required for the voltage in the circuit to build up to 36.8% of the maximum value
A-001-01-02:
What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the supply voltage?
One time constant
An exponential rate of one
A time factor of one
One exponential period
A-001-01-03:
What is the term for the time required for the current in an RL circuit to build up to 63.2% of the maximum value?
One time constant
An exponential period of one
A time factor of one
One exponential rate
A-001-01-04:
What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial value of stored charge?
One time constant
A discharge factor of one
An exponential discharge of one
One discharge period
A-001-01-05:
What is meant by "back EMF"?
A voltage that opposes the applied EMF
A current 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
A-001-01-06:
After two time constants, the capacitor in an RC circuit is charged to what percentage of the supply voltage?
86.5%
63.2%
95%
36.8%
A-001-01-07:
After two time constants, the capacitor in an RC circuit is discharged to what percentage of the starting voltage?
13.5%
36.8%
86.5%
63.2%
A-001-01-08:
What is the time constant of a circuit having a 100 microfarad capacitor in series with a 470 kilohm resistor?
47 seconds
4700 seconds
470 seconds
0.47 seconds
A-001-01-09:
What is the time constant of a circuit having a 470 microfarad capacitor in series with a 470 kilohm resistor?
221 seconds
221 000 seconds
47 000 seconds
470 seconds
A-001-01-10:
What is the time constant of a circuit having a 220 microfarad capacitor in series with a 470 kilohm resistor?
103 seconds
470 000 seconds
470 seconds
220 seconds
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