The dimensions of h/e (h = Planck's constant and e = electronic charge) are same as that of:
Correct answer: A. Magnetic flux
- A. Magnetic flux
- B. Electric flux
- C. Electric field
- D. Magnetic field
Explanation
The following is the solution: Plancks constant (h) has the units joule-seconds. the dimensions are =[ML2T−1], Electron charge (e) will have dimensions= [TI], Dimension for h/e will be [ML2T−2I−1], From the given options, Dimension for the electric field will be [M1L1I-1T-3], Dimension for magnetic flux will be [ML2T−2I−1], Dimension for electric flux will be [ML3T−3I−1], Dimension for the magnetic field will be [M1T-2I-1], Both magnetic flux and h/e will have the same dimensions.
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Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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