Exploring Current Electricity Concepts

What is Ohm's Law and how is it mathematically expressed?

• V = R / I

• I = V + R

• R = V - I

• Ohm's Law is expressed as V = I * R.

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

• 6A

• 3A

• 4A

• 2A

In a series circuit, how does the total resistance compare to the individual resistances?

• The total resistance is less than the smallest individual resistance.

• The total resistance is greater than the individual resistances.

• The total resistance is the same as the largest individual resistance.

• The total resistance is equal to the sum of the individual resistances.

What happens to the total current in a parallel circuit when more branches are added?

• The total current decreases.

• The total current remains the same.

• The total current increases.

• The total current fluctuates randomly.

Define electrical power and provide its formula.

• P = R/V

• P = I^2R

• P = VI

• P = V^2/R

If a device uses 60W of power and operates for 2 hours, how much energy does it consume in kilowatt-hours?

• 0.15 kWh

• 0.24 kWh

• 0.06 kWh

• 0.12 kWh

What is the relationship between voltage, current, and resistance in a circuit?

• Current (I) = Voltage (V) + Resistance (R)

• Voltage (V) = Current (I) * Resistance (R)

• Voltage (V) = Resistance (R) / Current (I)

• Resistance (R) = Voltage (V) - Current (I)

How do you calculate the equivalent resistance of two resistors in series?

• R_eq = R1 / R2

• R_eq = R1 * R2

• R_eq = R1 + R2

• R_eq = R1 - R2

In a parallel circuit with three resistors, how do you find the total current supplied by the battery?

• I_total = I1 + I2 + I3, where I1 = V/R1, I2 = V/R2, I3 = V/R3

• I_total = V/(R1 + R2 + R3)

• I_total = V/R_total

• I_total = I1 * I2 * I3

What is the unit of conductance and how is it related to resistance?

• The unit of conductance is ampere (A), and it is unrelated to resistance.

• The unit of conductance is siemens (S), and it is the reciprocal of resistance.

• The unit of conductance is volt (V), and it is the square of resistance.

• The unit of conductance is ohm (Ω), and it is the same as resistance.