Question 1
Measurement and UnitsThe dimensions of electromotive force are
- A.ML2T−3I−1.
- B.ML2T−3I−2.
- C.M2LT2I−1.
- D.M2L2T−1I−1.
Show the answer and explanation
Answer: A (ML2T−3I−1.)
Explanation
E.m.f. is energy per unit charge. Energy has dimensions ML2T−2 and charge has IT, so e.m.f. = ML2T−2 ÷ IT = ML2T−3I−1.