Daily review: Power, Voltage, Current & Resistance Formulas For DC Circuits | Basic Electrical Formulas | What is Electricity? Types, Sources & Generation of Electricity Quiz

Q: Which of the following is the correct formula for calculating power (P) in a DC circuit, given voltage (V) and current (I)?

P = V * I — Power is calculated by multiplying voltage and current.

Q: What unit is used to measure electric current?

Ampere (A) — Current is measured in Amperes (Amps).

Q: If a resistor has a voltage drop of 12V and a current of 2A flowing through it, what is its resistance?

6 Ohms — Resistance (R) = Voltage (V) / Current (I) = 12V / 2A = 6 Ohms.

Q: What does Ohm's Law state?

Current is directly proportional to voltage and inversely proportional to resistance. — Ohm's Law describes the relationship between voltage, current, and resistance.

Q: What is the unit of measurement for electrical resistance?

Ohm (?) — Resistance is measured in Ohms.

Q: Which of the following is a source of direct current (DC) electricity?

A battery — Batteries provide a constant flow of current in one direction.

Q: How is electrical power typically generated on a large scale?

Using generators driven by various energy sources. — Large-scale power generation primarily uses generators.

Q: If a circuit has a voltage of 24V and a resistance of 4 Ohms, what is the current flowing through it?

6 A — Current (I) = Voltage (V) / Resistance (R) = 24V / 4? = 6A

Q: Which formula is used to calculate the power dissipated by a resistor, given the resistance (R) and the current (I)?

P = I^2 * R — Power dissipated in a resistor is calculated by I^2 * R

Q: What is the primary difference between AC and DC electricity?

DC flows in one direction, while AC flows in alternating directions. — DC flows in a single direction, AC alternates direction periodically.

medium 10 Questions

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Question 1 of 10

Which of the following is the correct formula for calculating power (P) in a DC circuit, given voltage (V) and current (I)?

Power is calculated by multiplying voltage and current.

Question 2 of 10

What unit is used to measure electric current?

Current is measured in Amperes (Amps).

Question 3 of 10

If a resistor has a voltage drop of 12V and a current of 2A flowing through it, what is its resistance?

Resistance (R) = Voltage (V) / Current (I) = 12V / 2A = 6 Ohms.

Question 4 of 10

What does Ohm's Law state?

Ohm's Law describes the relationship between voltage, current, and resistance.

Question 5 of 10

What is the unit of measurement for electrical resistance?

Resistance is measured in Ohms.

Question 6 of 10

Which of the following is a source of direct current (DC) electricity?

Batteries provide a constant flow of current in one direction.

Question 7 of 10

How is electrical power typically generated on a large scale?

Large-scale power generation primarily uses generators.

Question 8 of 10

If a circuit has a voltage of 24V and a resistance of 4 Ohms, what is the current flowing through it?

Current (I) = Voltage (V) / Resistance (R) = 24V / 4? = 6A

Question 9 of 10

Which formula is used to calculate the power dissipated by a resistor, given the resistance (R) and the current (I)?

Power dissipated in a resistor is calculated by I^2 * R

Question 10 of 10

What is the primary difference between AC and DC electricity?

DC flows in a single direction, AC alternates direction periodically.

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