In this worksheet, we will practice converting between common units of capacitance and describing how capacitors work in circuits.
How many microfarads are there in 1 farad?
As a capacitor discharges, the amount of charge on it , and the potential difference across it .
- Aincreases, decreases
- Bincreases, increases
- Cdecreases, increases
- Ddecreases, decreases
- Edecreases, remains constant
The diagram shows a circuit containing a capacitor and a resistor. The capacitor is discharging, and there is an electric current through the circuit.
What would happen if a capacitor were allowed to discharge through the same circuit, but without the resistor?
- AThe capacitor would discharge more slowly.
- BThe current through the wire would cause it to melt.
- CThe capacitor would not discharge.
- DThe capacitor would explode.
- EThe capacitor would discharge almost instantaneously.
If the charge on a capacitor is , then the potential difference across it .
- Aincreased, decreases
- Bincreased, stays the same
- Cincreased, increases
- Ddecreased, increases
- Edecreased, stays the same
Diagram (A) shows a circuit consisting of a cell, a switch, a capacitor, and a resistor connected in series. Which of the four graphs in diagram (B) correctly shows the potential difference across the capacitor against time when the switch is closed?
What is 89 µF in millifarads?
The diagram shows a circuit containing a capacitor, a resistor, and a switch connected in series. The capacitor is initially fully charged, and the switch is initially open. Immediately after the switch is closed, the current through the circuit is 0.2 A. What was the potential difference across the capacitor when it was fully charged?
A capacitor is connected to a cell and allowed to fully charge. What is the potential difference across the capacitor once it has fully charged?
What is 24 mF in farads?
Which of the four circuit symbols shown in the diagram represents a capacitor?
The diagram shows a circuit that charges a capacitor. Once charged, which side of the capacitor, or , will be positively charged?
Which of the following is the correct unit for measuring capacitance?
- AAmpere (A)
- BCoulomb (C)
- CFarad (F)
- DHertz (Hz)
- EOhm (Ω)
The diagram shows two circuits containing capacitors. In which circuit is the capacitor charging?
- B(a) and (b)
- DNone of the answers