potential difference

What is potential difference?

The push that makes charges move around a circuit, measured in Volts (V).

How is potential difference measured?

Using a voltmeter connected in parallel across the component.

What does a higher potential difference from a battery cause?

A larger current to flow, which can make a bulb glow brighter.

What is the relationship between battery size and energy storage?

Bigger batteries can store more energy and last longer.

What is the significance of the rating on a lamp?

It indicates the potential difference the lamp is designed for; exceeding this may blow the bulb.

What happens to potential difference when cells are connected in series?

The potential difference adds up (e.g., 1.5V + 1.5V = 3V).

What is the difference between series and parallel circuits regarding current?

In series, current is the same everywhere; in parallel, current adds up across components.

What does potential difference measure between two points in a circuit?

The amount of energy gained or lost by charges as they move between those points.

What is the role of a cell or battery in a circuit?

To provide the energy (push) needed for charges to flow.

What is the analogy used to understand potential difference?

Thinking of potential as height; charges gain energy going up through the battery and lose energy going down through components.

What happens to the brightness of bulbs in a parallel circuit when more bulbs are added?

The brightness of each bulb remains the same as they share the same potential difference.

What is the effect of adding more components in series on the potential difference?

The total potential difference across the components adds up.

What type of connection is used to measure potential difference?

A voltmeter is connected in parallel to the component.

What is the definition of current in an electrical circuit?

The flow of charge, measured in Amperes (A), which is driven by potential difference.

What is the formula for total potential difference in a series circuit with three 1.5V cells?

Total potential difference = 1.5V + 1.5V + 1.5V = 4.5V.

What happens to the current when the potential difference increases?

The current increases because more energy drives more charge around the circuit.

What is the purpose of a voltmeter in a circuit?

To measure the potential difference across components.

What is the effect of connecting cells in the wrong direction in series?

The potential difference may cancel out, resulting in no effective push.

What is the relationship between potential difference and energy in a circuit?

Potential difference indicates how much energy is supplied to or used by charges as they move.

What is a practical activity to measure potential difference?

Using worksheets to measure p.d. across components in series and parallel circuits.

What is the effect of adding more bulbs in parallel on the total current?

The total current increases as more paths for charge flow are created.

What does the term 'push' refer to in the context of electricity?

It refers to the energy provided by the battery to drive charges through the circuit.