Some metal conductor has a resistance of 12ohm. When plugged into a circuit, the amount of heat 144J is released in 12s. What is the voltage at the ends of the conductors?​

Respuesta :

The voltage at the end of the conductors is 12V

Explanation:

Given:

Resistance, R = 12Ω

Heat released, H = 144J

Time, t = 12s

Voltage, V = ?

According to joule's law:

H = I²RT

where,

I is the current

T is the time

R is the resistance

The above formula can also be written as:

[tex]H = \frac{V^2}{R} t[/tex]

where,

V is the voltage

On substituting the value in the formula we get:

[tex]144 = \frac{V^2}{12} X 12\\\\V^2 = 144\\\\V = 12[/tex]

Therefore, the voltage at the end of the conductors is 12V

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