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 is the formula to calculate voltage?

Back

The formula to calculate voltage is V = I × R, where V is voltage, I is current, and R is resistance.

Front

What is the unit of voltage?

Back

The unit of voltage is Volts (V).

Front

What is the unit of current?

Back

The unit of current is Amperes (A) or Amps.

Front

What is the unit of resistance?

Back

The unit of resistance is Ohms (Ω).

Front

What does resistance do in an electrical circuit?

Back

Resistance reduces the flow of electric current in a circuit.

Front

If a 10Ω resistor has a current of 2A flowing through it, what is the voltage across it?

Back

The voltage across the resistor is 20V, calculated using Ohm's Law: V = I × R = 2A × 10Ω.

Front

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

Back

If resistance increases while voltage remains constant, the current decreases.

Front

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

Back

The relationship is defined by Ohm's Law: V = I × R.

Front

What is the effect of a short circuit on current flow?

Back

A short circuit provides a path of very low resistance, causing a large amount of current to flow, which can be dangerous.