PHYSICS

JAMB 2005 - Question 21

Physics 2005 JAMB Past Questions - Question 21: an electric device is rated 2000w 250v the correct fuse rating of the device is

Choose the correct answers from the options given.
an electric device is rated 2000w 250v the correct fuse rating of the device is
A:
B:
C:
D:
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Correct Answer

A

Explanation

for the device rated 2000 W, 250V, implies that current I flowing is given by the relation power = IV I = power = 2000 V 250 = 8A
To determine the correct fuse rating for the electric device rated at 2000 watts and 250 volts, you can use the formula:

Fuse Rating (in amperes) = Power (in watts) / Voltage (in volts)

In this case:

Fuse Rating (in amperes) = 2000 watts / 250 volts = 8 amperes

So, the correct fuse rating for the device is 8 amperes. You should use an 8A fuse to protect the device from excessive current. Make sure the fuse is rated for at least 8A to prevent overloading the circuit and damaging the device.