Electrical Circuits and Current Relationships

Front

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

Back

Power (P) = Voltage (V) × Current (I)

Front

What is Ohm's Law?

Back

Ohm's Law states that Voltage (V) = Current (I) × Resistance (R).

Front

What is the unit of electrical resistance?

Back

Ohm (Ω) is the unit of electrical resistance.

Front

What is the difference between alternating current (AC) and direct current (DC)?

Back

AC changes direction periodically, while DC flows in one direction.

Front

How does increasing voltage affect current in a circuit with constant resistance?

Back

Increasing voltage increases current, as they are directly proportional.

Front

What is the unit of electric current?

Back

The unit of electric current is Amperes (A).

Front

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

Back

Current (I) = Voltage (V) / Resistance (R) = 12V / 4Ω = 3A.

Front

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

Back

Power (P) = Voltage (V) × Current (I).

Front

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

Back

Current decreases, as they are inversely proportional.

Front

What is the power consumed by a device that uses 2A of current at 120V?

Back

Power (P) = Voltage (V) × Current (I) = 120V × 2A = 240W.