Electric Circuits & Ohm's Law

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 is commonly expressed as I = V/R.

Front

What is the formula for calculating voltage in a circuit?

Back

The formula for calculating voltage (V) in a circuit is V = I * R, where I is the current in amps and R is the resistance in ohms.

Front

What is the unit of measurement for resistance?

Back

The unit of measurement for resistance is Ohms (Ω).

Front

What is the unit of measurement for voltage?

Back

The unit of measurement for voltage is Volts (V).

Front

What is the unit of measurement for current?

Back

The unit of measurement for current is Amps (A).

Front

What components are needed to create a working electric circuit?

Back

A working electric circuit requires a power source (like a battery), a closed path (wires), and a load (like a lightbulb or resistor).

Front

If a circuit has a voltage of 12 V and a resistance of 4 ohms, what is the current?

Back

Using Ohm's Law, I = V/R = 12 V / 4 Ω = 3 A.

Front

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

Back

If resistance increases while voltage remains constant, the current decreases according to Ohm's Law.

Front

What is a closed circuit?

Back

A closed circuit is a complete electrical connection around which current flows or circulates.

Front

What is an open circuit?

Back

An open circuit is a broken or incomplete electrical connection, preventing current from flowing.