Question

Programa
① A Coil having a R=0.75ohm and L=6h is connected across 18V power supply.
Calculate
the Current after
3 Constants
​

Answer 1

Explanation:

Total power supplied =50V×4A=200W

Power lost as heat to the battery =I

2

R=4

2

×(8×

8

1

)=16W

Power lost as heat to the motor =I

2

r=4

2

×5=80W

Hence total power lost as heat =96W

Hence the usable power = Total power supplied − Power lost as heat

=200W−96W

=104W

Chemical power stored in battery = Voltage × current

=16V×4A

=64W

Hence, mechanical power available =104W−64W=40W