Ohm's Law & Calculations 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

Voltage (V) can be calculated using the formula V = I × R, where I is the current in Amps and R is the resistance in Ohms.

Front

What is the unit of Resistance?

Back

The unit of Resistance is Ohm, represented by the symbol Ω.

Front

What is the unit of Current?

Back

The unit of Current is Ampere, commonly referred to as Amps, represented by the symbol A.

Front

What happens to Current if Voltage increases while Resistance remains constant?

Back

If Voltage increases while Resistance remains constant, 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. This means that Voltage is the product of Current and Resistance.

Front

What does a resistor do in a circuit?

Back

A resistor limits the flow of electric current in a circuit, providing resistance.

Front

If a circuit has a Voltage of 12 Volts and a Resistance of 3 Ohms, what is the Current?

Back

Using Ohm's Law, Current (I) can be calculated as I = V / R = 12V / 3Ω = 4A.

Front

What is Power in an electrical context?

Back

Power (P) is the rate at which electrical energy is transferred by an electric circuit, calculated as P = V × I.

Front

What is the unit of Power?

Back

The unit of Power is Watt, represented by the symbol W.