Exploring Electronics and Electrical Concepts

What is the unit of electrical resistance?

• Ampere

• Ohm

• Watt

• Volt

Define Ohm's Law.

• Ohm's Law: V = I * R, where V is voltage, I is current, and R is resistance.

• Ohm's Law: R = V + I, where R is resistance, V is voltage, and I is current.

• Ohm's Law states that current is directly proportional to resistance and inversely proportional to voltage.

• Ohm's Law: P = V / I, where P is power, V is voltage, and I is current.

What is the primary function of a capacitor?

• To amplify electrical signals.

• To regulate voltage in circuits.

• The primary function of a capacitor is to store and release electrical energy.

• To convert AC to DC power.

Explain the difference between AC and DC current.

• AC is always stronger than DC.

• AC is used only in batteries.

• AC reverses direction periodically; DC flows in one direction.

• DC can reverse direction periodically.

What is the purpose of a transformer in electrical circuits?

• To change voltage levels in AC circuits.

• To convert AC to DC without changing voltage.

• To store electrical energy for later use.

• To increase current levels in DC circuits.

Describe the function of a diode.

• A diode allows current to flow in both directions.

• The function of a diode is to allow current to flow in one direction while blocking it in the opposite direction.

• A diode stores electrical energy for later use.

• A diode is used to amplify electrical signals.

What is the role of a resistor in a circuit?

• A resistor acts as a power source in a circuit.

• A resistor increases current flow in a circuit.

• A resistor limits current and controls voltage in a circuit.

• A resistor stores electrical energy for later use.

How does a circuit breaker work?

• A circuit breaker amplifies electrical flow to enhance performance.

• A circuit breaker is used to increase voltage in a circuit.

• A circuit breaker interrupts electrical flow to prevent overloads and short circuits.

• A circuit breaker serves as a permanent connection in electrical systems.

What is the significance of the power factor in electrical systems?

• The power factor indicates the efficiency of power usage in electrical systems.

• The power factor measures the voltage in electrical systems.

• The power factor only applies to renewable energy sources.

• The power factor is irrelevant to energy consumption.

Explain the concept of electromagnetic induction.

• Electromagnetic induction is the process of creating a magnetic field using electric current.

• Electromagnetic induction refers to the movement of electrons in a conductor without any external influence.

• Electromagnetic induction is the generation of voltage in a conductor due to a changing magnetic field.

• Electromagnetic induction is the phenomenon where a magnetic field is created by static electricity.