Resistor Color Codes Quiz

The fourth color band on a resistor indicates its tolerance, which represents the acceptable deviation from the nominal resistance value.

The first two color bands represent the first two digits of the resistance value, while the third band indicates the multiplier, which determines the number of zeros to add after the first two digits.

A resistor with color bands of Red, Red, Orange, Gold signifies a resistance value of 2200 Ohms. Red is 2, Red is 2, Orange is 3 zeros (multiplier of 1000), and Gold is 5% tolerance.

A silver 4th color band on a resistor indicates a tolerance of 10%, meaning the actual resistance can deviate by up to 10% from the stated value.

The third color band in the resistor color code system determines the multiplier for the first two digits. It essentially tells you how many zeros to add after those digits.

Amperes (A) are the units used to measure electric current.

The quantity of electrons flowing through a point in a circuit is directly proportional to the current. More electrons flowing means a higher current.

Ohm's Law is a fundamental equation in electrical circuits that describes the relationship between voltage (V), current (I), and resistance (R). The equation is $V = IR$.

The symbol Omega (Ω) represents resistance in electrical circuits.

If the voltage in a circuit is 12V (volts) and the resistance is 4 Ohms, the current in the circuit is 3 Amperes (A). We can use Ohm's Law ($V = IR$) to calculate this: 12V = I * 4Ω. Solving for I, we get I = 3A.