Home › CBSE Class 11 (Science) › Physics › Units and Measurement › Which SI defining constant is described as purel…
Which SI defining constant is described as purely technical?
AElementary charge e
BPlanck constant h
CSpeed of light c
DLuminous efficacy Kcd
Answer & Solution
Correct answer: D. Luminous efficacy Kcd
Unlike nature's constants such as c, the luminous efficacy Kcd is a purely technical constant.
Related questions
In electromagnetism, the symbol Q is added to T, L and M to represent what?Which base dimension is often added to T, L and M for thermodynamics?Why are length, velocity and time unsuitable as a set of base dimensions?In mechanics, the base dimensions T, L and M span a space of how many dimensions?Converting 35 yards to metres with 1 yard = 0.9144 m gives what length?Which pair of quantities can be compared directly, even in different units?An equation whose two sides have the same dimensions satisfies which property?Who introduced the concepts of dimensional analysis and quantity dimension in 1822?