S2 Review 2 - electricity

Front

What is electric current?

Back

Electric current is the flow of electric charge, typically measured in amperes (A). It represents the rate at which charge is flowing through a conductor.

Front

What is the relationship between voltage, current, and resistance?

Back

This relationship is described by Ohm's Law, which states that Voltage (V) = Current (I) x Resistance (R).

Front

What happens to current in a series circuit?

Back

In a series circuit, the same current flows through each component.

Front

What happens to voltage in a series circuit?

Back

The total voltage across the combination of resistors is the sum of the voltages across each individual resistor.

Front

What is equivalent resistance in a series circuit?

Back

The equivalent resistance of a series circuit is equal to the sum of the resistances of each individual resistor.

Front

What is the effect of adding resistors in parallel on total resistance?

Back

Adding resistors in parallel decreases the total resistance of the circuit.

Front

What happens to current when resistors are added in parallel?

Back

The total current supplied by the source increases as more resistors are added in parallel.

Front

What is the formula for calculating power in an electrical circuit?

Back

Power (P) is calculated using the formula P = Voltage (V) x Current (I).

Front

How do you calculate the current drawn by an appliance?

Back

Current can be calculated using the formula I = Power (P) / Voltage (V).

Front

What is the unit of electrical energy?

Back

The unit of electrical energy is the joule (J).