RC Circuits

What is the time constant of an RC circuit with a resistance of 5 ohms and a capacitance of 2 farads?

• 10 seconds

• 2.5 seconds

• 7 seconds

• 1 second

In an RC circuit, what happens to the voltage across the capacitor as time approaches infinity?

• It becomes zero

• It becomes equal to the supply voltage

• It oscillates

• It becomes negative

Which of the following is the correct formula for the time constant in an RC circuit?

What is the unit of the time constant in an RC circuit?

• Ohms

• Farads

• Seconds

• Volts

In an RC circuit, if the resistance is doubled, what happens to the time constant?

• It doubles

• It halves

• It remains the same

• It becomes zero

What is the initial current in an RC circuit when a DC voltage is applied?

• Zero

• Maximum

• Half of maximum

• Infinite

Which component in an RC circuit stores energy?

• Resistor

• Capacitor

• Inductor

• Diode

In an RC circuit, what is the phase difference between the voltage across the resistor and the voltage across the capacitor?

• 0 degrees

• 90 degrees

• 180 degrees

• 270 degrees

What happens to the charge on a capacitor in an RC circuit when the circuit is open?

• It remains constant

• It discharges

• It charges

• It oscillates

How does the frequency of an AC signal affect the impedance of an RC circuit?

• Increases with frequency

• Decreases with frequency

• Remains constant

• Becomes zero