A current of 2A passes through a wire of resistance 4&Ome...
A current of 2A passes through a wire of resistance 4Ω for 3 minutes. Calculate the energy lost
960J
1440J
2880J
48J
Correct answer is C
Power = current[I]\(^2\) * Resistance[R] → 2\(^2\) * 4 → 4 * 4 = 16watts
time = 3minutes → 3 * 60 = 180s
Energy = power * time → 16 * 180 = 2880j
A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is ...
What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperatu...
Electrons were discovered by ...
Which of the following is common to evaporation and boiling? They ...
The visible part of light consists of the following colours ...
A satellite revolving around the earth is kept on its orbit by? ...