A charge of 12 C passes through an electroplating apparatus in 2.0 min. What is the average current?
A) 0.10 A
B) 0.24 A
C) 0.60 A
D) 1.0 A
E) 6.0 A
A
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The Milky Way:
A) contains less than 50 billion stars. B) stretches across for just around 30,000 light-years. C) is known for being very unique. D) is larger than most other galaxies.
Based on our current Gregorian calendar, which of the following years is not a leap year?
A) 2000 B) 2004 C) 2008 D) 2012 E) All of the above are leap years.
According to Einstein, increasing the brightness of a beam of light without changing its color will increase:
a. the number of photons. b. the energy of each photon. c. the speed of the photons. d. the frequency of the photons.
A DC motor of internal resistance 6.0 ? is connected to a 24-V power supply. The operating current is 1.0 A
(a) What is the start-up current? (b) What is the back emf when the motor is running at full speed? (c) What is the back emf when the motor is running at half speed?