Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors
A wire of length 2.0 m has a resistance of 5.0 . Determine the electric field present inside the wire when a current of 10 A flows through it.
Options
- A100 V/m
- B25 V/m
- C0.25 V/m
- D4.0 V/m
Correct answer
B. 25 V/m
Step-by-step solution
The potential difference V across the wire is given by Ohm's law: V = IR Substituting the given values: V = 10 5.0 = 50 V The electric field E inside a uniform wire of length L is given by: E = V L Substituting the values of V and L : E = 50 2.0 = 25 V/m