Electric charge on an object is measured as 5 micro-coulombs. The value of this charge can be expressed in terms of base units as:
Correct answer: B. 5 x 10^-6 ampere second
- A. 5000 ampere second
- B. 5 x 10^-6 ampere second
- C. 5 x 10^6 coulomb second
- D. 500 coulomb second
Explanation
The following is the solution:Electric charge is a derived quantity, and its base unit is the coulomb (C), which is defined as the charge carried by a current of one ampere (A) in one second (s).So, 1 C = 1 A s.The prefix "micro" (μ) represents a factor of 10-6. Therefore, 5 microcoulombs (5 μC) can be expressed as:5 μC = 5 x 10-6 CTo express this value in terms of base units, we need to substitute the base unit of charge (coulomb) into the equation:5 x 10-6 C = (5 x 10-6 A) x 1 sSo, the value of 5 microcoulombs can be expressed in terms of base units as 5 x 10-6 ampere second, which is option B.
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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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