Question

Voltage = 230 v Resistance = 460 ohm working time= 5 minute Find heat?​

Answer 1

Answer:

$\boxed{\mathfrak{Heat \ produced \ (H) = 34.5 \ kJ}}$

Given:

Voltage (V) = 230 V

Resistance (R) = 460 $\sf \Omega$

Working time (t) = 5 min = 300 sec

To Find:

Heat produced (H)

Explanation:

Formula:

$\boxed{ \bold{H = \frac{V^2}{R}t}}$

Substituting value of V, R & t in the equation:

$\sf \implies H = \frac{ {(230)}^{2} }{460} \times 300 \\ \\ \sf \implies H = \frac{ \cancel{230} \times 230}{ \cancel{230} \times 2} \times 300 \\ \\ \sf \implies H = \frac{230}{ \cancel{2}} \times \cancel{2} \times 150 \\ \\ \sf \implies H = 230 \times 150 \\ \\ \sf \implies H = 34500 \: J \\ \\ \sf \implies H = 34.5 \: kJ$

$\therefore$

Heat produced (H) = 34.5 kJ

Answer 2

Answer:

V = 230 V

R = 460 ohm

t = 5 min = 300 s

H = V²/R t

= 230²/460 × 300

= 34500 J