JEE Advanced 2026 Physics question
In a new system of units, the units of mass, length, time and current are , , and , respectively. If and are the permeability and permittivity of free space, respectively, then in this new system of units, the magnitude of one SI unit of , is:
Answer: 25
Solution
**Identify the quantity.** is the impedance of free space, so it has the dimensions of resistance:
[ ]=[R]= .
(Check from :
See the full step-by-step solution
Create a free account to read the complete working (6 steps), and practise questions like this in a timed test.
Create a free account