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23 Nov 2019
A 80 W light bulb operates on a potential difference of 75 V.
(a) Find the current in the bulb.
___________ A
(b) Find the resistance of the bulb.
__________ O
(c) If this bulb is replaced with one whose resistance is doublethe value found in part
(b), is its power rating greater than or less than 80?
By what factor?
A 80 W light bulb operates on a potential difference of 75 V.
(a) Find the current in the bulb.
___________ A
(b) Find the resistance of the bulb.
__________ O
(c) If this bulb is replaced with one whose resistance is doublethe value found in part
(b), is its power rating greater than or less than 80?
By what factor?
Jean KeelingLv2
1 Apr 2019