A current of 5 A is flowing through the filament of a bulb of resistance 4 ohm. Calculate the electric
power of the bulb. If the current flows for 1 minute in (ii). Calculate the electric energy expended in the bulb
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Answer:
ᴄᴜʀʀᴇɴᴛ= 5ᴀ
ʀᴇsɪsᴛᴀɴᴄᴇ= 4 ᴏʜᴍ
ᴛɪᴍᴇ= 1 ᴍɪɴ= 60 sᴇᴄ
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ᴘᴏᴡᴇʀ=?
ᴇɴᴇʀɢʏ=?
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ғᴏʀᴍᴜʟᴀ ᴜsᴇᴅ
ᴠ=ɪʀ
ᴘ= ᴠ x ɪ
ᴇ= ᴘ x ᴛ
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ᴠ=ɪʀ
ᴠ= 5 x 4= 20 ᴠ
ᴘ= ᴠ x ɪ
ᴘ= 20 x 5= 100 ᴡᴀᴛᴛ
ᴇ= ᴘ x ᴛ
ᴇ= 100 x 60 = 6000 ᴡᴀᴛᴛ. sᴇᴄᴏɴᴅ
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