S2 Review 3 - 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 is expressed as V = I * R.

Front

What is the formula for calculating total resistance in series circuits?

Back

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

Front

What is the formula for calculating total resistance in parallel circuits?

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 + ...

Front

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

Back

The voltage drop (V_drop) across a resistor in a series circuit can be calculated using the formula: V_drop = (I * R), where I is the current through the resistor and R is the resistance.

Front

What is the relationship between voltage, current, and resistance?

Back

The relationship is defined by Ohm's Law: V = I * R, where V is voltage, I is current, and R is resistance.

Front

What is the unit of resistance?

Back

The unit of resistance is the Ohm (Ω).

Front

What is the unit of current?

Back

The unit of current is the Ampere (A).

Front

What is the unit of voltage?

Back

The unit of voltage is the Volt (V).

Front

If R1 = 3Ω, R2 = 4Ω, and R3 = 6Ω in series, what is the total resistance?

Back

R_total = R1 + R2 + R3 = 3Ω + 4Ω + 6Ω = 13Ω.

Front

If a circuit has a total voltage of 12V and a total resistance of 4Ω, what is the current?

Back

Using Ohm's Law: I = V/R = 12V / 4Ω = 3A.