Copy of Physics - Chapter 19 - Electrical Circuits
Authored by Moses Ntam
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
You connect a resistor across a battery. In which direction do the electrons flow?
A. The electrons flow from the negative terminal of the battery to the positive terminal of the battery.
B. The electrons flow from the positive terminal of the battery to the negative terminal of the battery.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does current depend on resistance in Ohm’s law?
A. Current is directly proportional to the resistance.
B. Current is inversely proportional to the resistance.
C. Current is proportional to the square of the resistance.
D. Current is inversely proportional to the square of the resistance.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of electricity, what is resistance?
A. Resistance is the property of materials to resist the passage of voltage.
B. Resistance is the property of materials to resist the passage of electric current.
C. Resistance is the property of materials to increase the passage of voltage.
D. Resistance is the property of materials to increase the passage of electric current.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mathematical formula for Ohm’s law?
A. V = I^2R
B. V = R/I
C. V = I/R
D. V = IR
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An accelerator accelerates He nuclei (change = 2e) to a speed of v = 2 × 10^6 m/s. What is the current if the linear density of He nuclei is λ = 108 m^–1?
A. I = 9.6 × 10^–5 A
B. I = 3.2 × 10^–5 A
C. I = 12.8 × 10^–5 A
D. I = 6.4 × 10^–5 A
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you verify whether a certain material is ohmic?
A. Make a resistor from this material and measure the current going through this resistor for several different voltages. If the current is proportional to the voltage, then the material is ohmic.
B. Make a resistor from this material and measure the current going through this resistor for several different voltages. If the current is inversely proportional to the voltage, then the material is ohmic.
C. Make a resistor from this material and measure the current going through this resistor for several different voltages. If the current is proportional to the square of the voltage, then the material is ohmic.
D. Make a resistor from this material and measure the current going through this resistor for several different voltages. If the current is inversely proportional to the square of the voltage, then the material is ohmic.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What voltage is needed to make 6 C of charge traverse a 100-Ω resistor in 1 min?
A. The required voltage is 1 × 10^−3 V.
B. The required voltage is 10 V.
C. The required voltage is 1,000 V.
D. The required voltage is 10,000 V.
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