Circuits review

Front

What is equivalent resistance in a circuit?

Back

Equivalent resistance is the total resistance of a circuit or a portion of a circuit, calculated by combining the individual resistances in series and parallel configurations.

Front

How does an ammeter function in a circuit?

Back

An ammeter measures the current flowing through a circuit and must be connected in series with the circuit branch to accurately measure the current without altering it.

Front

What happens to the brightness of bulbs when a new bulb is added in series?

Back

The brightness of the bulbs decreases because the total resistance increases, leading to a reduction in current.

Front

What is the formula for calculating total current in a circuit?

Back

Total current (I) can be calculated using Ohm's Law: I = V/R, where V is voltage and R is resistance.

Front

What is the unit of electrical power?

Back

The unit of electrical power is the Watt (W).

Front

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

Back

This relationship is defined by Ohm's Law: V = I * R, where V is voltage, I is current, and R is resistance.

Front

What is the difference between series and parallel circuits?

Back

In a series circuit, components are connected end-to-end, and the same current flows through all components. In a parallel circuit, components are connected across the same voltage source, and the current can split among the branches.

Front

How do you calculate the total resistance in a series circuit?

Back

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

Front

How do you calculate the total resistance in a parallel circuit?

Back

Total resistance in a parallel circuit can be calculated using the formula: 1/R_total = 1/R1 + 1/R2 + 1/R3 + ...

Front

What is the effect of adding more resistors in series?

Back

Adding more resistors in series increases the total resistance and decreases the total current in the circuit.