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Questions and Answers
What is the relationship between voltage and current in a capacitor-resistor circuit?
What is the relationship between voltage and current in a capacitor-resistor circuit?
- Voltage leads current by 90 degrees
- Voltage lags current by 90 degrees (correct)
- Voltage and current are inversely proportional
- Voltage and current are in phase
In a DC power supply, what role do capacitors play in converting AC to DC?
In a DC power supply, what role do capacitors play in converting AC to DC?
- Capacitors convert AC to DC directly
- Capacitors regulate the voltage output
- Capacitors store energy during AC peaks (correct)
- Capacitors act as resistors in the conversion process
What is the purpose of a full wave rectifier in converting AC to DC?
What is the purpose of a full wave rectifier in converting AC to DC?
- To store energy in capacitors
- To convert negative cycle to positive cycle (correct)
- To reduce the voltage
- To introduce resistance in the circuit
How does a capacitor store energy as the potential difference rises?
How does a capacitor store energy as the potential difference rises?
What happens to a capacitor after it has been charged and the power supply disconnected?
What happens to a capacitor after it has been charged and the power supply disconnected?
Why are capacitors used in UPSs (uninterrupted power supplies)?
Why are capacitors used in UPSs (uninterrupted power supplies)?
What happens when the power supply is disconnected in a capacitor-resistor circuit?
What happens when the power supply is disconnected in a capacitor-resistor circuit?
What happens when the charges on the negative and positive plates of a capacitor have equilibrated?
What happens when the charges on the negative and positive plates of a capacitor have equilibrated?
How does the discharging time of a capacitor depend on the resistance in the discharging circuit?
How does the discharging time of a capacitor depend on the resistance in the discharging circuit?
What does Ohm's law state about the relationship between current and resistance?
What does Ohm's law state about the relationship between current and resistance?
How does a larger capacitance affect the charge stored per unit potential difference in a capacitor?
How does a larger capacitance affect the charge stored per unit potential difference in a capacitor?
What happens to the current flow when the charge on the plates of a capacitor reaches zero?
What happens to the current flow when the charge on the plates of a capacitor reaches zero?
What equipment is needed to investigate the charge or discharge of a capacitor in a circuit?
What equipment is needed to investigate the charge or discharge of a capacitor in a circuit?
What is needed to be taken at set intervals in order to investigate the exponential relationships between current and potential difference with time?
What is needed to be taken at set intervals in order to investigate the exponential relationships between current and potential difference with time?
If capacitors discharge very quickly, what type of device can be used to collect data over time?
If capacitors discharge very quickly, what type of device can be used to collect data over time?
In the relationship 𝑉𝑖𝑖+1 = 𝑉𝑖𝑖 𝑉𝑖𝑖+1 / 2 = 𝑉𝑖𝑖, what does this indicate about the behavior of the system?
In the relationship 𝑉𝑖𝑖+1 = 𝑉𝑖𝑖 𝑉𝑖𝑖+1 / 2 = 𝑉𝑖𝑖, what does this indicate about the behavior of the system?
What does the time constant allow for experimental determination of in a capacitor-resistor circuit?
What does the time constant allow for experimental determination of in a capacitor-resistor circuit?
What do exponential graphs of charge stored with time show about the behavior of a capacitor?
What do exponential graphs of charge stored with time show about the behavior of a capacitor?
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