Ohm's Law and Electric Circuits (Physics)

Front

What unit is used to measure voltage?

Back

Volts

Front

What unit is used to measure current?

Back

Amps

Front

What unit is used to measure resistance?

Back

Ohms

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). It can be expressed as V = I × R.

Front

What is the formula to calculate power in an electric circuit?

Back

Power (P) can be calculated using the formula P = V × I, where P is power in watts, V is voltage in volts, and I is current in amps.

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 circuit where the current does not flow due to a break in the path.

Front

What is the role of a resistor in a circuit?

Back

A resistor is a component that resists the flow of electric current, thereby controlling the amount of current that can flow through the circuit.

Front

What is the difference between series and parallel circuits?

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, so the voltage across each component is the same.

Front

What is the function of a battery in a circuit?

Back

A battery provides a source of energy (voltage) to drive the current through the circuit.