RC Circuits

What is the formula for calculating the time constant of an RC circuit?

• T = R * C

• T = R ^ C

• T = R / C

• T = R + C

In a charging circuit, how does the voltage across the capacitor change over time?

• The voltage across the capacitor decreases linearly over time

• The voltage across the capacitor remains constant throughout

• The voltage across the capacitor rises exponentially at first, then stabilizes at the source voltage.

• The voltage across the capacitor oscillates periodically

Describe the process of discharging in an RC circuit.

• The process of discharging in an RC circuit involves the capacitor storing energy indefinitely.

• In an RC circuit, discharging occurs when the resistor absorbs energy from the capacitor.

• Discharging in an RC circuit results in the voltage across the capacitor increasing linearly over time.

• The process of discharging in an RC circuit involves the capacitor releasing stored energy through a resistor, causing the voltage across the capacitor to decrease exponentially over time.

How is the voltage across a capacitor related to the charge stored on it?

• V = Q * C

• V = Q/C

• V = Q - C

• V = Q + C

What is the relationship between the current through a resistor in an RC circuit and the voltage across the capacitor?

• The current through a resistor in an RC circuit is inversely proportional to the voltage across the capacitor.

• The relationship is that the current through a resistor in an RC circuit is equal to the rate of change of voltage across the capacitor multiplied by the capacitance of the capacitor.

• The current through a resistor in an RC circuit is not affected by the voltage across the capacitor.

• The current through a resistor in an RC circuit is equal to the voltage across the capacitor divided by the resistance of the resistor.

Calculate the energy stored in a capacitor with a capacitance of 10μF and a voltage of 12V.

• 0.0006 Joules

• 0.00072 Joules

• 0.0009 Joules

• 0.00144 Joules

In an RC circuit, if the resistance is increased, how does it affect the time constant?

• The time constant will remain the same.

• The time constant will become negative.

• The time constant will decrease.

• The time constant will increase.

Explain how the current through a resistor changes during the charging phase of an RC circuit.

• The current through a resistor increases linearly as the capacitor charges up

• The current through a resistor remains constant throughout the charging phase

• The current through a resistor oscillates during the charging phase

• The current through a resistor decreases exponentially as the capacitor charges up.

What happens to the energy stored in a capacitor when the capacitance is doubled?

• The energy stored in the capacitor is halved.

• The energy stored in the capacitor is quadrupled.

• The energy stored in the capacitor is doubled.

• The energy stored in the capacitor remains the same.

How does the time constant of an RC circuit change if the resistance is halved?

• The time constant of the RC circuit will remain the same.

• The time constant of the RC circuit will be doubled.

• The time constant of the RC circuit will be quadrupled.

• The time constant of the RC circuit will be halved.