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 'current' refer to in electrical circuits?

Back

Current refers to the flow of electric charge, typically measured in Amperes (A). It indicates how fast the electrons are flowing through a conductor.

Front

What is the unit of measurement for resistance?

Back

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

Front

What is voltage?

Back

Voltage, also known as electric potential difference, is the measure of the potential energy per unit charge available to drive the flow of current in a circuit. It is measured in Volts (V).

Front

How does resistance affect current in a circuit?

Back

According to Ohm's Law, if resistance increases while voltage remains constant, the current will decrease. Conversely, if resistance decreases, the current will increase.

Front

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

Back

The relationship is defined by Ohm's Law: V = I × R, where V is voltage, I is current, and R is resistance.

Front

What happens to current if the voltage is doubled while resistance remains constant?

Back

If the voltage is doubled while resistance remains constant, the current will also double, according to Ohm's Law.

Front

What is the formula to calculate power in an electrical 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 Amperes.

Front

What is the effect of increasing resistance on the flow of electrons?

Back

Increasing resistance makes it harder for electrons to flow, resulting in a decrease in current if voltage remains constant.

Front

What is the significance of a circuit being closed?

Back

A closed circuit allows current to flow continuously, while an open circuit interrupts the flow of current.