Ohm's Law Calculations

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 to calculate resistance using Ohm's Law?

Back

R = V / I

Front

What is the unit of resistance?

Back

The unit of resistance is the ohm (Ω).

Front

How do you calculate total resistance in a series circuit?

Back

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

Front

How do you calculate 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 + ...

Front

What is the equivalent resistance in a parallel circuit with resistances of 2 ohms, 3 ohms, and 6 ohms?

Back

1.2 ohms

Front

What is the relationship between voltage, current, and power in an electrical circuit?

Back

Power (P) is the product of voltage (V) and current (I): P = V * I.

Front

If a circuit has a resistance of 10 ohms and a current of 2 amps, what is the voltage across the circuit?

Back

20 volts

Front

What happens to the voltage across each resistor in a parallel circuit?

Back

The voltage is the same across all resistors.

Front

What is the power consumed by a circuit with a voltage of 10 volts and a current of 5 amperes?

Back

Power (P) = V * I = 10 volts * 5 amperes = 50 watts.