Ohm's Law Circuits

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. It can be expressed as V = I × R.

Front

What happens to current if voltage increases while resistance remains constant?

Back

The current will increase.

Front

What is the formula to calculate voltage in a circuit?

Back

Voltage (V) = Current (I) × Resistance (R) or V = I × R.

Front

What is the effect of adding resistors in series to a circuit?

Back

The total resistance will increase.

Front

What is the unit of resistance?

Back

Ohm (Ω).

Front

If a circuit has a total resistance of 45 ohms and a current of 0.2 amps, what is the voltage?

Back

Voltage (V) = I × R = 0.2 A × 45 Ω = 9 V.

Front

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

Back

Power (P) = Voltage (V) × Current (I).

Front

What is the total current in a circuit with a battery providing 0.35 amps?

Back

The total current going through the battery is 0.35 amps.

Front

What does it mean if a circuit has zero current?

Back

It means there is no flow of electric charge, which can occur if the circuit is open or if there is infinite 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 total current is the sum of the currents through each component.