Ohm's Law Basics - Flashcard

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 (V) is V = I × R, where I is the current in amperes and R is the resistance in ohms.

Front

What happens to current if voltage is constant and resistance is increased?

Back

If voltage is constant and resistance is increased, the current decreases.

Front

What is the unit of resistance?

Back

The unit of resistance is the Ohm (Ω).

Front

If the current is 3 A and the resistance is 6 Ω, what is the voltage?

Back

The voltage is 18 V (V = I × R = 3 A × 6 Ω).

Front

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

Back

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

Front

What happens to the current if the resistance is halved, assuming voltage is constant?

Back

If the resistance is halved, the current doubles.

Front

What is the slope of the voltage versus current graph?

Back

The slope of the voltage (V) versus current (I) graph represents resistance.

Front

If the voltage across a circuit is 12 V and the resistance is 4 Ω, what is the current?

Back

The current is 3 A (I = V / R = 12 V / 4 Ω).

Front

What is the effect of increasing voltage on current, assuming resistance remains constant?

Back

Increasing voltage will increase the current, assuming resistance remains constant.