A Motor with a Coil Resistance of 12 Ω Is

question 39

Multiple Choice

A motor with a coil resistance of 12 Ω is attached to a voltage supply of 75 V.What is the current in the motor when it is running at its maximum speed with a back emf of 25 V?

• A) zero
• B) 4.2 A
• C) 8.3 A
• D) 6.3 A
• E) ​600 A

---

Definitions:

Standard Deviation

A statistical measure of the dispersion or variability of a set of data points or investment returns, indicating the degree of risk involved.

Covariance

A metric that quantifies the extent to which two variables change in correspondence with each other.

Correlation Coefficient

A statistical measure that indicates the extent to which two variables change together, showing how one variable's movement is related to another's.

Standard Deviation

A statistical measurement that illustrates how spread out the values of a data set are around the mean, indicating the variability or volatility.