Unit 8 Electricity CSA Review

Front

What happens to the total resistance when resistors are added in parallel?

Back

The total resistance decreases.

Front

If a 2 Ω resistor is replaced with a 4 Ω resistor in a circuit where the voltage remains constant, how does the current change?

Back

The current halves.

Front

What happens to the total current in a parallel circuit when more branches are added?

Back

The total current increases.

Front

Which action will increase the current in a circuit?

Back

Decreasing resistance.

Front

A circuit has a resistance of 8 Ω and a current of 2 A. What is the voltage across the circuit?

Back

The voltage is 16 V.

Front

Define resistance in an electrical circuit.

Back

Resistance is the opposition to the flow of electric current, measured in ohms (Ω).

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). It is expressed as V = I × R.

Front

What is the effect of increasing voltage in a circuit with constant resistance?

Back

Increasing voltage will increase the current in the circuit.

Front

What is the formula for calculating total resistance in a series circuit?

Back

The total resistance (R_total) in a series circuit is the sum of all individual resistances: R_total = R1 + R2 + R3 + ...

Front

What is the formula for calculating total resistance in a parallel circuit?

Back

The total resistance (R_total) in a parallel circuit is given by 1/R_total = 1/R1 + 1/R2 + 1/R3 + ...