Question

A current flows in a wire of resistance 5 ?Having potential difference 7volt for 20 minutes the heat produced will be solution

Answer 1

Answer:

700 cal

Explanation:

difference is 7 volt and resistant is 5 ohm in 20 minutes

Answer 2

A current flows in a wire of resistance 5 ?Having potential difference 7volt for 20 minutes the heat produced will be solution - 2800 cal.

• Given,
• A current flows in a wire of resistance R = 5 ohm
• Having potential difference V = 7 volt
• for 20 minutes the heat produced t = 20 min = 20 * 60 sec
• we have formula for calculating the Heat generated,  
• H = V^2/R * t
• = 7^2/5 *  (20 × 60)
• = 49/5 * (1200)
• = 2800 cal