Electricity and Magnetism

Front

What is the difference between a series circuit and a parallel circuit?

Back

In a series circuit, components are connected end-to-end, so the same current flows through all components. In a parallel circuit, components are connected across common points, allowing multiple paths for current to flow.

Front

What device is used to increase or decrease voltage in an electrical circuit?

Back

A transformer is used to increase or decrease voltage in an electrical circuit.

Front

What is a conductor and give an example?

Back

A conductor is a material that allows the flow of electric current. An example is the carbon rod in a dry cell battery.

Front

How do you calculate current in a circuit?

Back

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

Front

What is Ohm's Law?

Back

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.

Front

What is the unit of electric current?

Back

The unit of electric current is the ampere (amps).

Front

What happens to the total resistance in a series circuit when more resistors are added?

Back

In a series circuit, the total resistance increases as more resistors are added.

Front

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

Back

In a parallel circuit, the total resistance decreases as more resistors are added.

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 can be calculated using the formula: 1/R_total = 1/R1 + 1/R2 + 1/R3 + ...