A small flashlight bulb draws 300 mA from its 1.5 V battery. What is the resistance of the bulb?
Everyday Science / Physics — Multiple-choice practice
- A. 5 Ω
- B. None of these
- C. 6 Ω
- D. 4 Ω
Correct answer
5 Ω
Explanation
Explanation Step 1: Recall Ohm's Law V = IR, where V is voltage, I is current, and R is resistance. Step 2: Convert current to amperes 300 mA = 0.3$ A Step 3: Calculate the resistance R = V/I = 1.5/0.3 = 5 Ω
Continue with Physics MCQs, explore all Everyday Science topics, or try the Physics practice quiz.
More Physics questions
- An electron is moving along the positive x-axis in a magnetic field that is in the xz-plane. The magnetic force on the electron will be along the ____?
- The phenomenon of total internal reflection is observed for an angle of incidence ______?
- Which planet is the least dense?
- Which of the following appliances has Cathode Ray Tube? Television, Telephone, Fax Machine, Washing Machine
- If distance is increasing uniformly with time, then velocity is?
- In space, far from massive objects like moon, earth or sun, gravity will be ____?
Found an error? Report a correction with this page URL and a supporting source.