The mechanical power output of an electric motor is 2.40 hp. The motor is connected to a 120 V source and is 85.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Determine the following. (a) current (in A) delivered to the motor (b) energy (in MJ) delivered to the motor by electrical transmission in 3.10 h of operation MJ (e) the cost to run the motor (in dollars) for 3.10 h, if the electric company charges $0.110/kWh $
The mechanical power output of an electric motor is 2.40 hp. The motor is connected to a 120 V source and is 85.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Determine the following. (a) current (in A) delivered to the motor (b) energy (in MJ) delivered to the motor by electrical transmission in 3.10 h of operation MJ (e) the cost to run the motor (in dollars) for 3.10 h, if the electric company charges $0.110/kWh $
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Transcribed Image Text:The mechanical power output of an electric motor is 2.40 hp. The motor is
connected to a 120 V source and is 85.0% efficient in converting power that
it takes in by electrical transmission into mechanical power. Determine the
following.
(a) current (in A) delivered to the motor
| A
(b) energy (in MJ) delivered to the motor by electrical transmission in 3.10 h
of operation
MJ
(e) the cost to run the motor (in dollars) for 3.10 h, if the electric company
charges $0.110/kWh
Expert Solution
Step 1
Given Values,
The power output of the motor
The voltage across the motor(V)=120 V
The efficiency of the motor
So, The power input is calculated as follows:
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