Fundamentals of Electrical Engineering

What is Ohm's Law?

• Ohm's Law describes the relationship between capacitance and voltage.

• Ohm's Law is defined as R = V / I.

• Ohm's Law states that power equals voltage times current.

• Ohm's Law is V = I * R.

How do you calculate resistance using Ohm's Law?

• R = I / V

• R = V * I

• R = V / I

• R = V + I

What is the unit of electrical resistance?

• Volt

• Watt

• Ohm

• Ampere

Define AC (Alternating Current) and DC (Direct Current).

• DC is current that alternates direction.

• AC and DC are both types of static electricity.

• AC is alternating current that changes direction, and DC is direct current that flows in one direction.

• AC is a type of battery power.

What is one key difference between AC and DC circuits?

• AC circuits use batteries, while DC circuits use generators.

• AC circuits are always more efficient than DC circuits.

• DC circuits can only power small devices, while AC circuits can power large appliances.

• AC circuits have alternating current, while DC circuits have direct current.

In which type of circuit does the current flow in one direction?

• Direct current (DC) circuit

• Capacitor circuit

• Alternating current (AC) circuit

• Resistor circuit

What is the formula for calculating power in a DC circuit?

• P = V × I

• P = V - I

• P = V + I

• P = I / V

What are the advantages of using AC over DC?

• AC is more dangerous than DC

• DC is cheaper for long-distance transmission

• Advantages of using AC over DC include efficient long-distance transmission, ease of voltage transformation, and lower costs for generators and motors.

• AC cannot be transformed to different voltages

What is the frequency of standard AC power in most countries?

• 100 Hz

• 40 Hz

• 70 Hz

• 50 Hz or 60 Hz

How does Ohm's Law apply to series and parallel circuits?

• Ohm's Law only applies to series circuits.

• Ohm's Law is irrelevant to electrical circuits.

• In parallel circuits, total resistance increases and current decreases.

• Ohm's Law applies by determining voltage, current, and resistance relationships in both series (total resistance increases, current decreases) and parallel (total resistance decreases, current increases) circuits.