Question

One ampere equals
a)${{10}^{6}}\mu A$
b)${{10}^{-6}}\mu A$
c)${{10}^{-3}}\mu A$
d)$10A$

Answer 1

Hint: One Ampere (A): One Ampere is defined as the current that flows with electric charge of 1 Coulomb per second. So, we can say that: $1A=\dfrac{1C}{1s}$ . Also, we know that \[1\mu ={{10}^{-6}}\]. Using the relations, compute the value of 1 Ampere in \[\mu A\] as required.

Complete step by step answer:As We know that: \[1\mu ={{10}^{-6}}\]
So, for a quantity of current, we can have: \[1\mu A={{10}^{-6}}A\]
Therefore, we can say that, \[1A={{10}^{6}}\mu A\]
Hence, the correct answer is the option (a).

Additional information:
a) One coulomb (C): One Coulomb is equal to the charge transfer in a metal in one second while constantly 1 Ampere of current flows through it.
b) One Ampere (A): One Ampere is defined as the current that flows with electric charge of 1 Coulomb per second.
c) One volt (V): One Volt is defined as energy consumption of 1 Joule per electric charge of 1 Coulomb.
d) One Ohm (Ω): One Ohm is the resistance of a conductor such that when a potential difference of 1 Volt is applied to its ends, a current of 1 Ampere flows through it.

Note:While converting one unit to another, be careful with the standard values of each unit. For example, \[1\mu ={{10}^{-6}}\] or \[1m={{10}^{-3}}\]. Do not mix up various quantities. Students might only get an error while remembering the standard quantities of the units.