Question

A 120 volt toaster has a resistance of 12 What must be the minimum rating of fuse in the electric circuit to which the toaster is connected.​

Answer 1

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

minimum rating of fuse in the electric circuit = 12.5 A

Generally 13A fuse are available in market so 13A fuse rating 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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Answer 2

$\sf\red{Given:-}$

• Volt = 120

• Resistance = 12 Ω

$\sf\red{Find:-}$

• What must be the minimum rating of fuse in the electric circuit to which the toaster is connected

$\sf\red{Solution:-}$

➳Formula of finding minimum current :

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \tt\bullet{ \: 1 = \frac{v}{r}}$

So,

$\longmapsto \tt{i = \frac{120}{12} }$

$\longmapsto \tt{i = \frac{10}{1} }$

$\longmapsto\tt\fbox{ 10 A}$

❝ So , the current rated is 10 A. ❞

$\red{▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬}$

@Shivam