Ohm's Law

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. It can be expressed as V = I × R.

Front

How do you calculate resistance?

Back

Resistance (R) can be calculated using the formula R = V ÷ I, where V is voltage and I is current.

Front

What is the unit of resistance?

Back

The unit of resistance is the Ohm (Ω).

Front

What does a resistor do in a circuit?

Back

A resistor limits the flow of electric current in a circuit.

Front

What is the formula for calculating voltage?

Back

Voltage (V) can be calculated using the formula V = I × R, where I is current and R is resistance.

Front

What is the significance of the color bands on a resistor?

Back

The color bands on a resistor indicate its resistance value and tolerance.

Front

What does the gold color band on a resistor indicate?

Back

The gold color band indicates a tolerance of ±5%.

Front

If the current through a circuit is 2 A and the resistance is 10 Ohms, what is the voltage?

Back

The voltage is 20 V, calculated using V = I × R (V = 2 A × 10 Ω).

Front

What does the color yellow represent on a resistor color band?

Back

The color yellow represents the digit 4.

Front

What is the tolerance of a resistor with a color band of brown?

Back

The brown color band indicates a tolerance of ±1%.