Q1. Multiple choice questions (Please answer on your Seantron). (1 point each) 1
ID: 1791569 • Letter: Q
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Q1. Multiple choice questions (Please answer on your Seantron). (1 point each) 1. A very large resistor is in parallel with a very small resistor. The equivalent resistance of this combination will be which of the following? (HW4b) A. slightly greater than the resistance of the large resistor B. slightly greater than the resistance of the small resistor C. slightly less than the resistance of the large resistor D. slightly less than the resistance of the small resistor E. can't be determined 2. Which of the follwing islae true?(HWsa) L. size and shape. IL. Change the length of a resistor will change its resis IlIL Resistivity is a physical property only of the material of which Resistance is a physical property only of the material of which the resistor is made and it is independent to stance but not change the resistivity esistivity is a bysical property only of the material f which the resisor is made, hence the resistivity is independent to size and shape. A. I and II are correct B. Il and III are correct C. Only I is correct D. Only Il is correct E. Only IIl is correct 3. Which one(s) is(are) correct? (HW 3d) IL The eletie poteaportional to lf, where r is the distance to the sphere center IlIl The electric potential outside a positively charged sphere is proportional to 1/r, where r is the distance to the sphere center. A. None B.I and II. C. I and I11. D. 1 E. All 4. In a certain region of space, the electric potential is zero everywhere along the x axis. (hw 3a) From this we can conclude that the x component of the electric field in this region is A. Zero. B. Constant but not zero C. Along the +x direction D. Along the -x direction 5. In a certain region of space, the electric field is zero. From this we conclude that the electric potential in this region must be which of the following? A. Zero. B. Constant but may not be zero. C. Positive D. Negative 6. Suppose you have a sphere of radius 1.00 m that carries a charge of+1.00 uC at its center. The radius of the sphere is changed to 0.500 m, and the charge is not changed. What happens to the flux through the sphere and the magnitude of the electric field at the surface of the sphere? (hw2a. 5) A. The flux and field both increase. B. The flux remains the same and the field remains the same C. The flux remains the same and the field increases. D. The flux decreases and the field increases. E. The flux and field both decrease.Explanation / Answer
1. D
2. B
3 C { For statement II r must be the radius of the sphere)
4. A { because E = -delta V
5 B { Same reason as 4)
6. C
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