Which one of the following statements is true about a series circuit?

- The current gets less as it goes round the circuit.
- The current remains the same and the voltages across each component add up to the battery voltage
- The currents add up to the total current and the voltage remains the same.
- The current increases as it goes around the circuit but the voltage decreases to zero.

Which one of the following statements is true about a parallel circuit?

- The current gets less as it goes round the circuit.
- The current remains the same and the voltages across each component add up to the battery voltage
- The currents add up to the total current and the voltage remains the same.
- The current increases as it goes around the circuit but the voltage decreases to zero.

The correct way of finding the total resistance of three parallel resistors is:

- RT = R1 + R2 + R3
- RT = 1/R1 + 1/R2 + 1/R3
- 1/RT = R1 + R2 + R3
- 1/RT = 1/R1 + 1/R2 + 1/R3

Kirchhoff's First Law says that:

- Total current flowing into a point is the same as the current flowing out of that point.
- Current loses strength as it flows about a circuit.
- Voltage loses strength as it flows about a circuit.
- Wires need insulation to stop electrons from leaking out of the wire

Kirchhoff's Second Law states:

- Sum of the potential differences is less than the battery voltage.
- The sum of the potential differences is dependent on the route taken by the current.
- The sum of potential differences throughout the circuit adds up to zero, regardless of the route taken.
- The sum of potential differences throughout the circuit adds up to zero, but only if the components are in series.

Which one of these statements is true about a potential divider?

- The output voltage is the fraction of the voltage represented by the fraction the second (bottom) resistor is of the overall resistance.
- The output voltage is the fraction of the voltage represented by the fraction of the overall current.
- The output voltage is always half the input voltage.
- A potential divider only works if the resistors have fixed values.

Which one of these statements is true about the conservation of charge?

- The same number of protons leave the battery as electrons come in
- Charge can only be conserved if the wires are adequately insulated.
- The same number of protons flows into the battery as flows out.
- The same number of electrons flows into a battery as flows out.

Which of the following is true about a conventional current?

- It flows from positive to negative because that is the way the protons move.
- It is regarded as flowing from positive to negative, although in reality electrons flow from negative to positive (the early physicists got it wrong).
- It flows from positive to negative because that is the way the electrons move.
- It flows from negative to positive because that is the way the electrons move.

Which one of these is the BEST definition of EMF?

- The force pushing electrons in a wire.
- The terminal voltage of a battery when connected to a voltmeter in open circuit.
- The energy per unit charge converted by the source into electrical energy.
- The energy per unit charge converted by the circuit into other kinds of energy.

EMF and potential difference are measured in volts. An alternative unit for volts is:

- newtons per coulomb
- ohms per coulomb.
- joules per coulomb
- joules per amp

Which one of these statements is true about internal resistance?

- All batteries have internal resistance, but can be treated as perfect batteries in series with an internal resistor.
- All batteries have internal resistance, but can be treated as perfect batteries in parallel with an internal resistor.
- All batteries have internal resistance, but the internal resistor can be removed to make the battery perfect.
- Only cheap batteries have internal resistance.

A battery of internal resistance 0.5 ohms is connected to a load of resistance 4 ohms. If the battery has an EMF of 6.0 volts, what is the terminal voltage when it is under load?

- 3.0 V
- 4.5 V
- 5.3 V
- 6.0 V

When a battery has internal resistance, some energy is lost. What happens to the lost energy?

- The lost energy isn't really lost at all; it's all down to poor design in the circuit.
- It corrodes away the internal resistor.
- It is stored in the battery as lost energy.
- It is lost in heating up the battery

The lost voltage in a battery can be related to one of Kirchhoff's Laws.

- It is related to Kirchhoff I because some current is lost in the internal resistance.
- It is related to Kirchhoff I because there is a voltage drop across the internal resistor
- It is related to Kirchhoff II because there is a voltage drop across the internal resistor
- It is related to Kirchhoff II because some current is lost in the internal resistance.

(Harder) At which one of these situations does maximum power transfer occur?

- When the load resistance is the same as the internal resistance.
- When the load resistance is much greater than the internal resistance.
- When there is a short circuit.
- When the internal resistor is shorted out, making the battery perfect.