Electricity and Magnetism

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) of the conductor. The formula is I = V/R.

Front

How do you calculate voltage using Ohm's Law?

Back

Voltage (V) can be calculated using the formula V = I x R, where I is the current in Amperes and R is the resistance in Ohms.

Front

What happens to total resistance in a parallel circuit when one light goes out?

Back

The total resistance increases because there are fewer paths for the electrons to flow, leading to more backed up electrons.

Front

What is the effect on brightness of remaining lights in a parallel circuit when one light goes out?

Back

The remaining lights become dimmer because the total current is reduced as the total resistance increases.

Front

If a circuit operates at 75 Volts and has a resistance of 5 Ohms, what is the current?

Back

The current can be calculated using Ohm's Law: I = V/R = 75V / 5Ω = 15 Amps.

Front

What is the unit of electrical resistance?

Back

The unit of electrical resistance is the Ohm (Ω).

Front

What is the unit of electrical current?

Back

The unit of electrical current is the Ampere (A), often shortened to Amp.

Front

What is the unit of voltage?

Back

The unit of voltage is the Volt (V).

Front

What is a closed circuit?

Back

A closed circuit is a complete electrical loop that allows current to flow without interruption.

Front

What is a parallel circuit?

Back

A parallel circuit is a type of electrical circuit where the components are connected across common points or junctions, providing multiple paths for current to flow.