Question

If fuse of 250 mA, 500 mA, 1 A, 5 A and 10 A were available, which one would be the most suitable for protecting an amplifier rated at 240 V, 180 W?

Answer 1

1A fuse is the most suitable for protecting an amplifier rated at 240 V, 180 W.

Explanation:

Given: The amplifier is rated as 240V, 180 W.

So,

$p = v \times i$

$i = \frac{p}{v}$

$i = \frac{180}{240}$

$i = 0.75 \: amperes$

The maximum protecting current is 0.75 A which is nearer to 1A fuse.

So, 1A fuse is the most suitable for protecting an amplifier rated at 240 V, 180 W.

Answer 2

1 A would Suit Best

Explanation:

• we know that,

I = $\frac {p}{v}$

• So, by putting the values in the formula, we get

I= $\frac {180}{240}$ = 0.75 A

Fuse wire should withstand only little more amount of current then 0.75 A. so the required fuse is of 1 A.