Q60. A 120 volt toaster has a resistance of 12 e .What must be the minimum rating of fuse in the electric circuit to to which which the toaster is connected. (A) 10 Amp. (B) 15 Amp. (C) 5 Amp. (D) 20 Amp.
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Answer:
V=IxR
R=V/I
R=120/3.3
R=36.36 Ohm
Explanation:
20 mp
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Given : A 120 volt toaster has a resistance of 12
To Find : What must be the minimum rating of fuse in the electric circuit to which the toaster is connected.
Solution:
Voltage = 120 V
Resistance = 12 Ω
Current I = V/R
=> I = 120/12
=> I = 10 A
Rated current = 10A
minimum rating of fuse in the electric circuit is generally 125 % of rated current
Hence minimum rating of fuse = (125/100)10 = 12.5 A
From the given options 15A fuse can be used.
Learn More:
What is an electric fuse? why is it advised to use three pin plugs while using power appliances?
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