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Current Electricity — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
MCQ
Identify the correct statement from the following.
  • A
    While traversing in a closed loop, if negative pole of cell is encountered first, then the emf is negative.
  • B
    The product of resistance and current in an arm is taken to be positive if the direction of current is opposite to the direction in which one moves along the closed loop.
  • C
    Current flowing away from a junction is taken as positive.
  • D
    While traversing in a closed loop, if positive pole of cell is encountered first, then the emf is positive.
✓

Answer

  1. While traversing in a closed loop, if positive pole of cell is encountered first, then the emf is positive.

Explanation:

According to sign convention while traversing a closed loop (in clockwise or anti-clockwise direction), if positive pole of the cell is encountered first then its emf is negative or else, it will be positive.

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