Electrical Equations

Front

What does the letter P stand for in electrical equations?

Back

P stands for Power, measured in Watts.

Front

What does the letter I stand for in electrical equations?

Back

I stands for Current, measured in Amperes (A).

Front

Calculate the current that will pass through a 15 ohms resistor when the voltage across the resistor is 6V.

Back

0.4A (Using Ohm's Law: I = V/R = 6V/15Ω).

Front

A fan with a resistance of 20 Ω is connected to a power supply. The current flowing through the circuit is 2.5 A. What is the voltage of the power supply?

Back

50V (Using Ohm's Law: V = I * R = 2.5A * 20Ω).

Front

Calculate the power of the appliance through which a current of 2A flows at the mains voltage (220 V).

Back

440W (Using the formula: P = V * I = 220V * 2A).

Front

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

Back

P = V * I, where P is power, V is voltage, and I is current.

Front

What is Ohm's Law?

Back

Ohm's Law states that V = I * R, where V is voltage, I is current, and R is resistance.

Front

Define resistance in an electrical context.

Back

Resistance is a measure of the opposition to the flow of electric current, measured in Ohms (Ω).

Front

What is the unit of electric current?

Back

The unit of electric current is the Ampere (A).

Front

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

Back

Voltage (V) is directly proportional to current (I) and resistance (R) according to Ohm's Law: V = I * R.