Physicshard · Past Paper
Calculate the effective resistance of three resistors 3Ω, 6Ω, and 9Ω connected in parallel.
A1.63 Ohms
B18 Ohms
C2 Ohms
D0.5 Ohms
✓ Correct Answer: A — 1.63 Ohms
1/R = 1/3 + 1/6 + 1/9 = (6+3+2)/18 = 11/18. R = 18/11 ≈ 1.636 Ohms.
Share this question
More from Physics
- The force that binds the solar system is:
- An object is thrown upwards with a velocity of 19.6 m/s. How long will it take to reach the top? (g = 9.8 m/s^2)
- Which device is used to maintain a constant current by varying resistance?
- A ball is dropped from a tower of height h. It takes T seconds to reach the ground. Where is the ball at time T/2?
- An electric bulb of 60 W is used for 5 hours a day. The energy consumed in 30 days is: