Understanding Electricity Concepts

What is Ohm's Law?

• Ohm's Law states that R = V / I.

• Ohm's Law is I = V + R.

• Ohm's Law defines power as P = I / R.

• Ohm's Law is V = I * R.

State the formula for Ohm's Law.

• I = V + R

• V = I * R

• R = V - I

• V = R / I

If the voltage is 12V and the resistance is 4Ω, what is the current?

• 2A

• 4A

• 6A

• 3A

What is an electric circuit?

• A device that converts electrical energy into light.

• An electric circuit is a closed loop that allows electric current to flow.

• A series of batteries connected in parallel.

• A method of storing electric charge in a capacitor.

Name the two main types of electric circuits.

• Single and Double

• Direct and Alternating

• Series and Parallel

• Open and Closed

In a series circuit, how is the total resistance calculated?

• R_total = R1 * R2 * R3 * ... * Rn

• R_total = R1 - R2 - R3 - ... - Rn

• R_total = 1/(1/R1 + 1/R2 + 1/R3 + ... + 1/Rn)

• R_total = R1 + R2 + R3 + ... + Rn

What happens to the total current in a series circuit when more resistors are added?

• The total current decreases.

• The total current increases.

• The total current remains the same.

• The total current fluctuates randomly.

In a parallel circuit, how is the total resistance calculated?

• 1/R_total = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

• R_total = R1 - R2 - R3 - ... - Rn

• R_total = R1 * R2 * R3 * ... * Rn

• R_total = R1 + R2 + R3 + ... + Rn

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

• The total current fluctuates randomly.

• The total current decreases.

• The total current remains the same.

• The total current increases.

Define electrical power.

• Electrical power is the total amount of energy stored in a circuit.

• Electrical power is the maximum energy capacity of a battery.

• Electrical power is the rate of energy transfer in an electrical circuit, measured in watts.

• Electrical power is the voltage multiplied by the current, measured in joules.