D. both B and C will cause gas pressure to decrease because adding more gas is like adding more energy and reducing the space (volume) the atoms will move more quickly but won't have space, therefore pressure will increase.
The difference in the power required by the motor at start up and at operating speed is 9778.57
<h3>What is power? </h3>
This is defined as the rate in which energy is consumed. Electrical power is expressed mathematically as:
Power (P) = voltage (V) × current (I)
P = IV
Power = square voltage (V²) / resistance ®
P = V² / R
<h3>How to determine the power by the EMF</h3>
- Voltage (V) = 37 V
- Resistance (R) = 0.14 Ω
- Power by EMF (P₁) =?
P = V² / R
P₁ = 62² / 0.14
P₁ = 27457.14 watts
<h3>How to determine the power by the back EMF</h3>
- Voltage (V) = 62 V
- Resistance (R) = 0.14 Ω
- Power by back EMF (P₂) =?
P = V² / R
P₂ = 37² / 0.14
P₂ = 9778.57 watts
<h3>How to determine the power difference</h3>
- Power by EMF (P₁) = 27457.14 watts
- Power by back EMF (P₂) = 9778.57 watts
- Difference in power =?
Difference = P₁ - P₂
Difference in power = 27457.14 - 9778.57
Difference in power = 17678.57 watts
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