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 can be expressed as V = I × R.

Front

What does the term 'Resistance' mean in electrical terms?

Back

Resistance is a measure of how difficult it is for electrons to flow through a material. It is measured in Ohms (Ω).

Front

What is the unit of measurement for current?

Back

The unit of measurement for current is Amperes (A), commonly referred to as 'Amps'.

Front

How do you calculate Resistance using Voltage and Current?

Back

Resistance (R) can be calculated using the formula R = V / I, where V is voltage and I is current.

Front

What is the relationship between Voltage, Current, and Resistance?

Back

According to Ohm's Law, the relationship is defined as V = I × R, meaning voltage is equal to the product of current and resistance.

Front

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

Back

If resistance increases while voltage remains constant, the current will decrease.

Front

What is the effect of increasing voltage on current if resistance is constant?

Back

If voltage increases while resistance remains constant, the current will also increase.

Front

What is a closed circuit?

Back

A closed circuit is a complete electrical loop that allows current to flow. It requires a closed switch.

Front

What is an open circuit?

Back

An open circuit is a broken electrical loop that prevents current from flowing. It occurs when the switch is open.

Front

What is the formula for calculating Power in an electrical circuit?

Back

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