The source of electrons in an ordinary electric circuit is
A) a dry cell, wet cell, or battery.
B) usually a wall socket.
C) a generator at the power station.
D) the electric conductor itself.
E) none of the above
Answer: D
You might also like to view...
In an isochoric process, the internal energy of a system decreases by 50J. What is the work done?
A. zero B. +50 J C. -50 J D. none of the above
An isolated air-filled parallel-plate capacitor that is no longer connected to anything has been charged up to Q = 2.9 nC. The separation between the plates initially is 1.20 mm, and for this separation the capacitance is 31 pF
Calculate the work that must be done to pull the plates apart until their separation becomes 5.30 mm, if the charge on the plates remains constant. (?0 = 8.85 × 10-12 C2/N • m2 )
The air we breathe is mostly oxygen
a. True b. False Indicate whether the statement is true or false
A projectile is launched at an angle less than 30° and at speed v. Which will increase the projectile's range more, ignoring atmospheric drag?
a. doubling the launch angle b. increasing the speed of launch by 50% c. reducing the mass of the projectile d. launching on February 29th