Physics, 16.10.2020 08:01 tinagibbs98
1. If all other things remain equal, which of the following changes to a closed circuit would result in increased resistance to the flow of electric current?
Correct A) Reducing the thickness of the conductor
B) Replacing the conductor with a more conductive material
Incorrect Response: C) Reducing the length of the conductor
D) Reducing the temperature of the conductor
2. What term refers to producing magnetism by placing a body within a magnetic field?
A) Polarization
B) Natural magnetism
C) Incorrect Response: Artificial magnetism
D) Correct Induced magnetism
3. What two things must exist for an electric current to be produced?
A) A negatively charged electrode and a positively charged electrode
B) Incorrect Response: A pair of highly conductive materials and a conducting path between them
C) Correct An electric potential between two bodies and a conducting path joining the bodies
D) A source of voltage and an open circuit
4. If all other things remain equal, which of the following changes to a closed circuit would result in increased resistance to the flow of electric current?
A) Correct Reducing the thickness of the conductor
B) Replacing the conductor with a more conductive material
C) Incorrect Response: Reducing the length of the conductor
D) Reducing the temperature of the conductor
5. Three components in a parallel circuit have individual resistances of r1, r2, and r3. What formula can you use to determine the total resistance of the circuit?
A) 1/R= r1 + r2 + r3
B) Incorrect Response: R= 1/r1 + 1/r2 + 1/r3
C) Correct 1/R= 1/r1 + 1/r2 + 1/r3
D) R= r1 + r2 + r3
6. Which of the following materials commonly used in electronic devices is classified as a semiconductor?
A) Correct Silicon
B) Incorrect Response: Copper
C) Glass
D) Plastic
7. Which of the following explains why your hair stands on end when you rub it with a balloon?
A) The balloon creates friction, which sticks your hair to it.
B) Correct Electrons from your hair jump to the balloon, causing it to become negatively charged on one side.
C) Incorrect Response: Protons from your hair jump to the balloon, causing it to become negatively charged on one side.
D) Protons from the balloon jump to your hair, causing it to become negatively charged.
Answers: 1
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1. If all other things remain equal, which of the following changes to a closed circuit would result...
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