Electrical Circuits and Ohm's Law

These flashcards cover key concepts related to Ohm's Law, circuit calculations, and the behavior of components in electrical circuits.

What formula is used to calculate resistance in Ohm's Law?

Resistance (R) is calculated using R = V / I, where V is voltage and I is current.

If V = 9.0 V and I = 0.30 A, what is the resistance?

The resistance is 30 ohms.

In a circuit with V = 12 V and I = 2.0 A, how do you calculate power?

Power (P) is calculated using P = V x I; thus, P = 12 V x 2.0 A = 24 W.

How much energy is delivered in 30 seconds if power is 24 W?

Energy (E) is calculated using E = P x t; thus, E = 24 W x 30 s = 720 J.

What happens to the brightness of the original bulb when a second identical bulb is added in parallel?

The brightness of the original bulb remains the same because they share current evenly.

What happens to the total current drawn from the battery when a second bulb is added in parallel?

The total current increases because the load is balanced between the bulbs.

What is the equivalent resistance of three resistors in series: R1 = 4.0 Ω, R2 = 6.0 Ω, and R3 = 10.0 Ω?

The equivalent resistance is R_total = R1 + R2 + R3 = 4.0 + 6.0 + 10.0 = 20.0 Ω.

What is the formula to calculate the total current in a circuit with a 12 V battery and 20.0 Ω resistance?

The total current (I) is calculated using I = V / R; hence I = 12 V / 20.0 Ω = 0.6 A.

How do you calculate the voltage drop across a resistor in a series circuit?

Voltage drop (V) across a resistor is calculated using V = I x R, where I is current and R is resistance.

If the current is 0.6 A across R1 = 4.0 Ω, what is the voltage drop across it?

The voltage drop across R1 is V = 0.6 A x 4.0 Ω = 2.4 V.

What is the voltage drop across R2 = 6.0 Ω with a current of 0.6 A?

The voltage drop across R2 is V = 0.6 A x 6.0 Ω = 3.6 V.

Calculate the voltage drop across R3 = 10.0 Ω with a current of 0.6 A.

The voltage drop across R3 is V = 0.6 A x 10.0 Ω = 6.0 V.

How do you calculate the total power supplied by the battery in a circuit?

Total power (Ptotal) is calculated using Ptotal = V x I; where V is the battery voltage and I is total current.