ohms law and circuits

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

What is the unit of current?

Back

The unit of current is Amperes (A).

Front

What is the unit of resistance?

Back

The unit of resistance is Ohms (Ω).

Front

What is the unit of voltage?

Back

The unit of voltage is Volts (V).

Front

How do you calculate current using Ohm's Law?

Back

Current (I) can be calculated using the formula I = V / R, where V is the voltage and R is the resistance.

Front

If a circuit has a voltage of 12 volts and a resistance of 4 ohms, what is the current?

Back

I = V / R = 12V / 4Ω = 3 A.

Front

What is a series circuit?

Back

A series circuit is a circuit in which the components are connected end-to-end, so that the same current flows through each component.

Front

What is a parallel circuit?

Back

A parallel circuit is a circuit in which the components are connected across common points or junctions, resulting in multiple paths for the current.

Front

What happens to the total resistance in a series circuit?

Back

In a series circuit, the total resistance (R_total) is the sum of the individual resistances: R_total = R1 + R2 + R3 + ...

Front

What happens to the total resistance in a parallel circuit?

Back

In a parallel circuit, the total resistance (R_total) can be calculated using the formula: 1/R_total = 1/R1 + 1/R2 + 1/R3 + ...