Question

How much current will an electric bulb draw from a 220 V source, if the resistance of the bulb filament is 1200 Ω?​

Answer 1

Gɪᴠᴇɴ :-

• Potential Difference (V) = 220 V
• Resistance (R) = 1200 ohms

ᴛᴏ ғɪɴᴅ :-

• Current (I)

sᴏʟᴜᴛɪᴏɴ :-

On using OHM'S LAW, we get,

• Potential Difference = Current × Resistance

➭ V = I × R

➭ 220 = I × 1200

➭ I = 220/1200

➭ I = 0.18 A

Hence,

• Current (I) drawn is 0.18 A

Note :

Ohm's law → This law states that "the current flowing through a conductor is directly proportional to the potential difference across ends of conductor provided the temperature and other physical condition remains the same.

• It gives the relationship between electric current and potential difference

Answer 2

Answer:

Explanation:

According to Ohm's law, the current is ratio of voltage and resistance hence can be written as:

Plug the given values in the formula: