**I am having some trouble inderstanding these concepts, if possible, please exp
ID: 1420250 • Letter: #
Question
**I am having some trouble inderstanding these concepts, if possible, please explain each answer, thanks!*** A. The # of charge carriers stays the same, and the drift speed increases. B. The drift speed stays the same, and the # of charge carriers increases. C. The charge carried by each charge carrier increases. D. The current density decreases2. If the current is doubled, what changes? A. The voltage across the resistor doubles. B. The resistance of the resistor doubles. C. The voltage in the wire between the battery and the resistor doubles. D. The voltage across the resistor drops by a factor of 2. E. The resistance of the resistor drops by a factor of 2.
Ohm's Law A. B. C. D. E. The three plots show voltage vs. current (so the slope is R) for three kinds of device. What are the devices? Resistor, superconductor, diode Diode, superconductor, resistor Resistor, diode, superconductor Diode, resistor, superconductor Superconductor, resistor, diode I. Current (mA)
Explanation / Answer
1) Correct option is (A)
drift velocity vd = I/nAq
if current is incresed. then drift speed will be increased.
2) Correct option is (C)
From Ohms law
V = IR
if current increased voltgae also increased,for particular wire resisitance is constant.
3) Correct option is (E)
The slope of V and i graph give resistance R.
Super conducotr intially have less resistance the slope is zero
The slope of V and i graph give resistance R.
From ohms law V =iR , we get straight line for resistor
In diode upto certain limit, ithave potential barrier. So it have maximum resistance intially. So slope is more.
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