everyday science MCQ #50136

Nine volt lantern draws zero point five amp steady approximate resistance?

everyday science MCQ #50136

  1. Question 1

    Q1. Nine volt lantern draws zero point five amp steady approximate resistance?

    • A) Eighteen ohms about
    • B) Four ohms wrongly undershoot
    • C) Forty ohms wrongly overshoot modestly
    • D) One-half ohm tiny wrongly ignored decimal

    Answer: Eighteen ohms about

    Explanation: Ohm's law states that resistance equals voltage divided by current (R = V/I); for a 9 V source drawing 0.5 A, R = 9 ÷ 0.5 = 18 ohms. The other values result from arithmetic errors in applying the formula.