Potential difference and Resistance

Question 1

What is the importance of potential difference and resistance?

Answer 1

The current through any component depends on both the potential difference across the component and the resistance of the component.

Question 2

What is the definition of potential difference?

Answer 2

The energy transferred to the component or work done on it by each coulomb of charge that passes through it. The unit of potential difference is (V)

Question 3

What is the formula for potential difference?

Answer 3

Potential difference (V) = Energy transferred (E (Joules)) divided by charge flow (coulombs(C))

Question 4

What is the definition of resistance?

Answer 4

As electrons move through a component they must push their way through lots of vibrating atoms. The atoms resists the flow of electrons. This is the resistance of the component.

Question 5

What the formula for resistance?

Answer 5

Resistance = Voltage divide by Amperes

Question 6

What components do we need to measure the resistance of a circuit?

Answer 6

1. The ammeter that is connected in series with the bulb.
2. The voltmeter which is connected in parallel with the bulb.