Electricity and Magnetism - SS2 Physics Past Questions and Answers - page 3

In an RC circuit, the time constant is defined as the time it takes for the voltage across the capacitor to reach what percentage of its maximum value?

In an RC circuit, the time constant is determined by which of the following quantities?

A capacitor in an RC circuit is initially fully charged. How many time constants does it take for the voltage across the capacitor to decrease to approximately 5% of its initial value?

If the capacitance in an RC circuit is doubled while keeping the resistance constant, how does the time constant change?

In an RC circuit, the charging time constant is given by the product of the resistance and capacitance. If the resistance is increased while the capacitance is kept constant, what happens to the charging time constant?

In an RC circuit, the resistance is 100 ohms and the capacitance is 10 microfarads. Calculate the time constant of the circuit.

In an RC circuit, the time constant is 5 seconds. If the capacitance is 20 microfarads, what is the value of the resistance?

In an RC circuit, the initial voltage across the capacitor is 12 volts. After one time constant, the voltage decreases to 3 volts. What is the percentage of voltage remaining after one time constant?

In an RC circuit, the time constant is 2 milliseconds. If the capacitance is 4 microfarads, what is the value of the resistance?

In an RC circuit, the resistance is 1 kilohm and the time constant is 10 microseconds. What is the capacitance of the circuit?