Question

A current flows in a wire of resistance 5 ohm having potential difference 7 volt for 20 minutes. The heat produced is
(A) 140 cal (B) 280 cal (C) 700 cal (D) 2800 cal​

Answer 1

$\huge{\boxed{\boxed{\red{\mathbb{ANSWER}}}}}$

explanation:-

$r = 5 \: ohm \\ v = 7 \\ t = 20 \: minites \\ \\ Heat \: generated \\ \: \: \: \: \: \: \frac{ {v}^{2} }{r} \times t = > \frac{ {7}^{2} }{5} \times 20 \times 60 \\ = > 2800cal$

may be it's helpful for you ✴️

please mark me as brainliest ✌️✌️

Answer 2

Answer:

2800cal

Explanation:

i think this is correct answer