Several resistors are connected in parallel the resistance of their equivalent resistor will:
Correct answer: B. Decrease
- A. Increase
- B. Decrease
- C. Not change
- D. None of these
Explanation
In a parallel circuit, the net resistance decreases as more components are added, because there are more paths for the current to pass through.
This question appeared on the ETEA MDCAT 2014 paper, which you can sit online with every answer explained.
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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.
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