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AP POLYCET PHYSICS Multiple Choice Questions (MCQs)

AP POLYCET Physics Electric Current MCQs

AP POLYCET Physics - Electric Current MCQs

What is the SI unit of electric current?
- A) Volt
- B) Ampere
- C) Ohm
- D) Coulomb
Answer: B) Ampere
Which of the following is the unit of resistance?
- A) Ampere
- B) Volt
- C) Ohm
- D) Coulomb
Answer: C) Ohm
What is the relationship between voltage, current, and resistance called?
- A) Faraday's Law
- B) Ohm's Law
- C) Kirchhoff's Law
- D) Coulomb's Law
Answer: B) Ohm's Law
Which of the following materials is an example of a conductor?
- A) Rubber
- B) Wood
- C) Copper
- D) Plastic
Answer: C) Copper
If the resistance in a circuit increases, the current will:
- A) Increase
- B) Decrease
- C) Stay the same
- D) Become zero
Answer: B) Decrease
Which of the following is the formula for calculating the power dissipated in a resistor?
- A) P = I × R
- B) P = V × I
- C) P = V² / R
- D) P = I² × R
Answer: B) P = V × I
Which instrument is used to measure electric current?
- A) Voltmeter
- B) Ammeter
- C) Ohmmeter
- D) Multimeter
Answer: B) Ammeter
What is the effect of doubling the resistance in a circuit, while keeping the voltage constant?
- A) Current doubles
- B) Current is halved
- C) Current stays the same
- D) Current becomes zero
Answer: B) Current is halved
What is the formula for calculating the total resistance in a series circuit?
- A) R_total = R1 + R2
- B) R_total = 1 / (1/R1 + 1/R2)
- C) R_total = R1 × R2
- D) R_total = (R1 + R2) / 2
Answer: A) R_total = R1 + R2
What is the unit of electrical power?
- A) Watt
- B) Volt
- C) Ampere
- D) Ohm
Answer: A) Watt
Which of the following statements is true about resistors connected in parallel?
- A) The total resistance decreases
- B) The current is the same through each resistor
- C) The voltage is the same across all resistors
- D) The total resistance increases
Answer: A) The total resistance decreases
What happens to the current in a parallel circuit if the number of resistors is increased?
- A) The current increases
- B) The current decreases
- C) The current remains the same
- D) The current becomes zero
Answer: A) The current increases
If the voltage across a resistor is increased, the current through the resistor will:
- A) Decrease
- B) Stay the same
- C) Increase
- D) Become zero
Answer: C) Increase
Which of the following is not a characteristic of an ideal conductor?
- A) Zero resistance
- B) No energy dissipation
- C) Infinite conductivity
- D) High resistance
Answer: D) High resistance
In a circuit, the total resistance is 10Ω, and the current flowing is 2A. What is the potential difference across the resistor?
- A) 5V
- B) 20V
- C) 10V
- D) 15V
Answer: B) 20V

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AP POLYCET PHYSICS Multiple Choice Questions (MCQs)

AP POLYCET Physics - Electric Current MCQs

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