Voltage and Charge in Circuits

The video tutorial explains the behavior of a circuit with a capacitor when a switch is closed and then opened. Initially, the capacitor is fully charged, sharing voltage with a parallel resistor. Upon opening the switch, immediate and long-term effects on current and voltage are analyzed. The tutorial concludes with the final charge and voltage distribution across the circuit components.

What is the charge on the capacitor when the switch has been closed for a long time?

• 10 nano coulombs

• 8 nano coulombs

• 16 nano coulombs

• 20 nano coulombs

How is the voltage across the capacitor determined when the switch is closed?

• By measuring the current through the capacitor

• By using the battery voltage directly

• By using the voltage across the 4 ohm resistor

• By calculating the total circuit resistance

How do the resistors share the battery voltage when the switch is closed?

• Only the 4 ohm resistor gets the voltage

• Only the 1 ohm resistor gets the voltage

• Proportionally to their resistance

• Equally

What happens to the charge on the capacitor immediately after the switch is opened?

• It decreases by half

• It doubles

• It becomes zero

• It remains the same

What is the current through the 1 ohm resistor immediately after the switch is opened?

• 0 amps

• 1 amp

• 2 amps

• 4 amps

In the long term, what happens to the current through the 1 ohm resistor after the switch is opened?

• It remains constant

• It becomes zero

• It fluctuates

• It increases

How is the voltage across the capacitor determined in the long term after the switch is opened?

• By the initial charge on the capacitor

• By the total battery voltage

• By the current through the circuit

• By the voltage drop across the 1 ohm resistor

What is the final charge on the capacitor when it gets the full battery voltage?

• 16 nano coulombs

• 8 nano coulombs

• 20 nano coulombs

• 10 nano coulombs

What is the voltage across the capacitor when it is fully charged in the final state?

• 8 volts

• 10 volts

• 6 volts

• 12 volts

What happens to the voltage across the 1 ohm resistor in the final state of the circuit?

• It halves

• It doubles

• It becomes zero

• It becomes equal to the battery voltage