Question

A 10 ohm wire is connected to a 2V source. The amount of heat generated in the wire in 1 minute 1. 0.4 J 2. 12J 3. 24J 4. 48 J​

Answer 1

the amount of wire is 12J

Answer 2

Given:

Resistance, r = 10 ohm

Voltage, v = 2V

Time, t = 1 minute

To Find:

Heat generated, h

Solution:

The formula for heat generated in the wire is,

$h = {i}^{2} rt$

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

$i = \frac{2}{10}$

$i = \frac{1}{5}$

i = 0.2 A

t = 1 minute = 60 seconds.

$h = {(0.2)}^{2} (10)(60)$

h = 0.04 × 10 × 60

h = 4 × 6

h = 24 J. (Option 3)

The amount of heat generated in the wire in 1 minute is 24 J (Option 3).