Ηλεκτρική Αντίσταση Quiz

What is Ohm's Law?

• Ohm's Law relates the voltage (V), current (I), and resistance (R) in a circuit, and is expressed as V = I * R.

• Ohm's Law is a type of musical notation

• Ohm's Law is used to calculate the speed of light

• Ohm's Law is the study of electromagnetic fields

State the formula for calculating resistance using Ohm's Law.

• R = V - I

• R = V / I

• R = I / V

• R = V * I

What is resistivity?

• Resistivity is a measure of a material's ability to resist the flow of electric current.

• Resistivity is a measure of a material's ability to conduct the flow of electric current.

• Resistivity is a measure of a material's ability to store electric current.

• Resistivity is a measure of a material's ability to generate electric current.

Explain the concept of series circuits.

• In a series circuit, the total resistance is the sum of the individual resistances, and the total voltage is the sum of the individual voltages.

• In a series circuit, the total resistance is the maximum of the individual resistances, and the total voltage is the maximum of the individual voltages.

• In a series circuit, the total resistance is the product of the individual resistances, and the total voltage is the product of the individual voltages.

• In a series circuit, the total resistance is the average of the individual resistances, and the total voltage is the average of the individual voltages.

How are resistances connected in a series circuit?

• Resistances are not connected in a series circuit.

• Resistances are connected in parallel to each other.

• Resistances are connected one after the other in a single path.

• Resistances are connected randomly in different paths.

What happens to the total resistance in a series circuit?

• The total resistance becomes negative.

• The total resistance decreases.

• The total resistance increases.

• The total resistance remains the same.

Explain the concept of parallel circuits.

• Parallel circuits are a type of electrical circuit where the components are connected in such a way that the current has multiple paths to flow.

• Parallel circuits are a type of mechanical circuit

• Parallel circuits are not used in electrical engineering

• Parallel circuits have only one path for the current to flow

How are resistances connected in a parallel circuit?

• Resistances in a parallel circuit are connected in a random pattern.

• Resistances in a parallel circuit are not connected to each other.

• Resistances in a parallel circuit are connected across the same two points, allowing multiple current paths.

• Resistances in a parallel circuit are connected in a series, one after the other.

What happens to the total resistance in a parallel circuit?

• The total resistance stays the same.

• The total resistance increases.

• The total resistance decreases.

• The total resistance becomes negative.

Calculate the total resistance in a series circuit with resistances of 4Ω, 6Ω, and 8Ω.

• 15Ω

• 20Ω

• 10Ω

• 18Ω