The head of a car take a current of 0.4 amphere from a 12 volt supply. The energy produced in 5 minutes is
P = EI = 0.4 * 12 = 4.8W
48W * 5min = 24 watt-minutes = 24*60 J
To calculate the energy produced, we need to use the formula:
Energy (in joules) = Power (in watts) × Time (in seconds)
First, let's calculate the power:
Power (in watts) = Current (in amperes) × Voltage (in volts)
Given:
Current = 0.4 amperes
Voltage = 12 volts
Power = 0.4 A × 12 V = 4.8 watts
Now, let's convert the time from minutes to seconds:
Time = 5 minutes × 60 seconds/minute = 300 seconds
Finally, we can calculate the energy:
Energy = Power × Time = 4.8 W × 300 s = 1440 joules
Therefore, the energy produced in 5 minutes is 1440 joules.
To calculate the energy produced by the car's headlight, we need to use the formula:
Energy = Power x Time
First, let's calculate the power consumed by the car's headlight.
Power (P) = Current (I) x Voltage (V)
Given that the current is 0.4 amperes and the voltage is 12 volts, we can substitute these values into the formula:
P = 0.4 A x 12 V
P = 4.8 watts
Now, we can calculate the energy produced in 5 minutes using the power and time:
Time (T) = 5 minutes = 5 x 60 = 300 seconds
Energy (E) = Power (P) x Time (T)
Substituting the values we have:
E = 4.8 W x 300 s
E = 1440 watt-seconds
Note: The energy is expressed in watt-seconds (W.s) or joules (J).