What is Ohms Law equation which links V, I and R together.

The ampere is the unit of resistance.

What is the flow of electric charge across a surface?

Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?

What is the p.d. of a device which has a resistance of 5 Ohms and a current of 2 A?

An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately

What equation links Power, Current and Voltage (p.d.) together?

Power rating is related to resistance value.

If a Kettle has a power of 2300 W and a voltage of 230V is supplied to it - what will be the current flowing through the kettle?

Ohm's law describes how current is related to voltage and resistance.

How much resistance is required to limit the current from a 12 V battery to 3.6 mA?

The formula for finding resistance when current and voltage are known is R = I/V.

If 750 µA is flowing through 11 k of resistance, what is the voltage drop across the resistor?

The power rating of a resistor determines the minimum power that it can handle safely.