Two 6 ohm resistors are connected in parallel. Their combined resistance is
Correct answer: C. 3 ohms
- A. 12 ohms
- B. 6 ohms
- C. 3 ohms
- D. 0.33 ohms
Explanation
For two equal resistors in parallel the result is simply half of one of them, so 3 ohms. The general rule is that the reciprocals add, and the total is always smaller than the smallest branch because the current has more than one path available. Adding to get 12 ohms is the series answer.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Resistance and Resistivity
Resistance measures opposition to current in a conductor and follows R = V/I for an ohmic conductor, while resistivity is an intrinsic property of the material. Questions use R = ρL/A, examine effects of length, cross-sectional area and temperature, and distinguish resistance, resistivity, conductance and conductivity.
Practise Current Electricity
1,052 free Current Electricity MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Resistance and Resistivity questions
Three resistors of 2, 3 and 5 ohms are connected in series. The total resistance is
The SI unit of resistivity is
A wire is stretched so that its length doubles while its volume stays constant. Its resistance becomes
The reciprocal of the resistivity of a material is called its:
If the length of the conductor is made 4 times its original length, its resistance becomes
A wire of uniform area of cross -section A length L and resistance R is cut into two parts. The resistivity of each part: