Question

An electric bulb works on 230V line and draws 0.1A current. The resistance of the filament is *

Answer 1

Answer:

Explanation:

v=ir

r=v/i

r=2300ohm

Answer 2

Answer:

$\bigstar{\bold{Resistance=2300\: \Omega}}$

Explanation:

$\Large{\underline{\underline{\bf{Given:}}}}$

• Potential difference (V) = 230 V
• Current ( I ) = 0.1 A

$\Large{\underline{\underline{\bf{To\:Find:}}}}$

• Resistance (R)

$\Large{\underline{\underline{\bf{Solution:}}}}$

→ By Ohm's law resistance is given by

  R = V/I

→ Substituting the given datas, we get

 R = 230 / 0.1

 R = 2300 Ω

$\boxed{\bold{Resistance=2300\: \Omega}}$

$\Large{\underline{\underline{\bf{Notes:}}}}$

→ Ohm's law state that the current flowing through a conductor is directly proportional to the potential difference applied across its ends provided the temperature and other physical factors remain unchanged.

V = RI

→ R gives the nature of conducting medium. It is the resistance of the conductor.

→ Ohm's law is not a universal law. It is not applicable for semi conductors.