Physics Quiz: Part 9

An interactive quiz on Electrostatics and Circuits.

Fundamental Concepts Review

Ohm's Law: The fundamental relationship in circuits is $V=IR$, connecting voltage (V), current (I), and resistance (R).

  • Series Circuits: One path. Current is constant. $R_{eq} = R_1 + R_2 + ...$
  • Parallel Circuits: Multiple paths. Voltage is constant. $\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + ...$

Kirchhoff's Laws: For complex circuits, use the Current Law ($\Sigma I_{in} = \Sigma I_{out}$ at a junction) and the Voltage Law ($\Sigma V = 0$ around a loop).

Problem 1: Ohm's Law

Easy
CircuitsOhm's LawCurrentResistance

A 12 V car battery is connected to a headlight with a resistance of 3 Ω. How much current flows through the headlight?

A

36 A

B

4 A

C

0.25 A

D

15 A