Question 1

Lea charges a capacitor and then discharges it through a resistor. She notices that, after three time constants, the voltage across the capacitor has decreased to _____ of its value just prior to the initiation of the discharge.

Accepted Answer

The answer of Lea charges a capacitor and then discharges...

Question 2

You charge a capacitor and then discharge it through a resistor. You notice that, after four time constants, the voltage across the capacitor has decreased to _____ of its value just prior to the initiation of the discharge.

Accepted Answer

The answer of You charge a capacitor and then discharge...

Question 3

Doubling the resistance in an RC circuit

Accepted Answer

The time constant of an RC circuit is given by τ = RC, where R is the resistance and C is the capacitance. Doubling the resistance, R, will result in a doubling of the time constant, τ.

Question 4

An uncharged capacitor and a resistor are connected in series to a battery at t = 0 s. If ε = 15 V, C = 20 μF, and R = 4.0 × 10⁵ Ω, the current as a function of time for this circuit is

Accepted Answer

The answer of  An uncharged capacitor and a resistor...

Question 5

Doubling the capacitance in an RC circuit

Accepted Answer

The time constant of an RC circuit is given by the product of the resistance and capacitance, RC. If the capacitance is doubled, then the time constant becomes 2RC. Therefore, doubling the capacitance doubles the time constant of the circuit.

Question 6

Tony charges a capacitor and then discharges it through a resistor. He notices that, after two time constants, the voltage across the capacitor has decreased to _____ of its value just prior to the initiation of the discharge.

Accepted Answer

The answer of Tony charges a capacitor and then discharges...

Question 7

An uncharged capacitor and a resistor are connected in series to a battery at time t = 0 s. If ε = 15 V, C = 20 μF, and R = 4.0 × 10⁵ Ω, the charge on the capacitor as a function of time is

Accepted Answer

The answer of  An uncharged capacitor and a resistor...

Question 8

The switch S is initially at position a for a long time. It is then switched to position b. Describe what happens to the lightbulb as a function of time when the switch is flipped from a to b?

Accepted Answer

The answer of  The switch S is initially at...

Question 9

The switch S is initially at position b for a long time. It is then switched to position a. Describe what happens to the lightbulb as a function of time when the switch is flipped from b to a?

Accepted Answer