A dc motor is connected to a emf of 12.0 V. The resistance of its windings is 2.0 
At normal operating speed, the motor delivers 6.0 W of mechanical power. What current does it draw at normal operating speed?
A. 6.0 A
B. 0.50 A
C. 1.0 A
D. 3.0 A
B. 0.50 A
Physics & Space Science
You might also like to view...
What is the average orbital speed of the Earth around the Sun? (Note: r = 1.5 x 1011 m and P = 3.16 107 s)
A. About 30 km/s. | ||
B. About 4.7 km/s. | ||
C. About 9.8 m/s2. | ||
D. 365 days. | ||
E. 1,000 km/s. |
Physics & Space Science
What is the magnetic moment of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm × 8.0 cm?
A) 0.023 A?m2 B) 0.23 A?m2 C) 2.3 A?m2 D) 23 A?m2 E) 230 A?m2
Physics & Space Science
The internal activity of Mercury is responsible for its ________.
A. slow rotation B. lack of an atmosphere C. high surface temperature D. magnetic field
Physics & Space Science
The period of the second hand on a clock is
A) 1 second. B) 1/60 second. C) 60 seconds. D) 3600 seconds. E) 12 hours.
Physics & Space Science