Suppose we increase the absolute temperature of a semiconductor from 200 K to 300 K. By roughly what factor does this make the semiconductor more conductive? (Hint: How much more likely is it for a conduction band energy level to be occupied by an electron?)
A. 1.5 times
B. 3 times
C. 4.5 times
D. 20 times
E. One cannot tell with the information given.
E. One cannot tell with the information given.
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Ohm's Law: The figure shows electrons passing through a resistor. The arrow shows the direction in which the electrons are moving. Which of the following statements are correct? (There could be more than one correct choice.)
A. The electrons are moving slower at point b than at point a. B. The electric potential is higher at point b than at point a. C. The electric potential is lower at point b than at point a. D. The electrons are losing electric potential energy as they move through the resistor from a to b. E. The speed of the electrons at point b is the same as it is at point a.
Uranus and Neptune both rotate ________ than the Earth does
Fill in the blank(s) with correct word
The circles in the picture below are Gaussian surfaces. All other lines are electric field lines. For which cases is the flux non-zero?
The mass of an atom of carbon-12 (Z = 6) is less than the mass of 6 protons and 6 neutrons because of binding energy
Indicate whether the statement is true or false