1. A current of 2.0 A flows past point A. The charge that flows through point A
ID: 2124367 • Letter: 1
Question
1. A current of 2.0 A flows past point A. The charge that flows through point A in 8 seconds is:
a. 2.0 C
b. 4.0 C
c. 8.0 C
d. 16.0 C
2. A negatively charged particle is in the presence of an electric field. If it%u2019s released (under no other forces) which
way would it move?
a. In the direction of the electric field
b. In the direction opposite of the electric field
c. Perpendicular to the electric field
d. It wouldn%u2019t move at all
e. Not enough information is given to answer this question
3. A parallel plate capacitor is connected to a voltage source. Which of the following would NOT increase the net
capacitance in the circuit? (Assume all other factors remain constant.)
a. Increase plate size
b. Decrease separation distance
c. Increase the dielectric constant
d. Increase the voltage across the capacitor
e. Connect a second, identical capacitor in parallel
4. In an RLC circuit, suppose you wanted to RAISE the resonance frequency. Which
of the following would do it?
a. Use a resistor with larger R
b. Use an inductor with larger L
c. Use a capacitor with larger C
d. B or C would raise the resonance frequency
e. None of these would raise the resonance frequency
5. When an object is very far away from a concave mirror, an image is formed:
a. 1 focal length in front of the mirror
b. 1 focal length behind the mirror
c. 2 focal lengths in front of the mirror
d. On the face of the mirror
e. It%u2019s impossible to calculate without the object distance and focal length
6. An object%u2019s length (1.0 m) and width (2.0 m) is measured as shown at right by a person traveling along the
length of the object with velocity V, which is close to the speed of light. Which of the following are possible correct
values for the object%u2019s proper dimensions? http://s23.postimg.org/6ksvk2nzf/mc6.jpg
a. 1.0 m long by 2.0 m wide
b. 1.5 m long by 2.0 m wide
c. 0.8 m long by 2.0 m wide
d. 0.8 m long by 1.5 m wide
e. 1.0 m long by 1.5 m wide
7. A 250 W visible light does not eject electrons from a metal plate. Which type of source might start getting
electrons ejected?
a. A more intense (500 W) visible light
b. A microwave source
c. An ultraviolet source
d. An infrared source
8. What energy photon must be absorbed by a hydrogen atom in order to move an electron from the n=1 to
n=4 state?
a. 13.6 eV
b. 12.8 eV
c. 10.2 eV
d. 0.85 eV
e. 0.66 eV
9. Which of the following is the best explanation of the Heisenberg Uncertainty principle?
a. Electrons are in energy states surrounding an atom
b. Different types of radiation have different affects on living tissue
c. Time slows down an uncertain amount when you move fast
d. The more accurately you measure position, the less you know about
momentum
e. You never know when an nucleus is going to undergo radioactive decay
10. Which of the following is not an allowed value for the magnetic quantum number (ml) when the
principal quantum number (n) is 4?
a. 0
b. -1
c. -2
d. 4
e. 1
Explanation / Answer
1. A current of 2.0 A flows past point A. The charge that flows through point A in 8 seconds is:
a. 2.0 C
b. 4.0 C
c. 8.0 C
d. 16.0 C
2. A negatively charged particle is in the presence of an electric field. If it%u2019s released
(under no other forces) which way would it move?
a. In the direction of the electric field
b. In the direction opposite of the electric field
c. Perpendicular to the electric field
d. It wouldn%u2019t move at all
e. Not enough information is given to answer this question
3. A parallel plate capacitor is connected to a voltage source. Which of the following would NOT increase the net capacitance in the circuit? (Assume all other factors remain constant.)
a. Increase plate size
b. Decrease separation distance
c. Increase the dielectric constant
d. Increase the voltage across the capacitor
e. Connect a second, identical capacitor in parallel
4. In an RLC circuit, suppose you wanted to RAISE the resonance frequency. Which
of the following would do it?
a. Use a resistor with larger R
b. Use an inductor with larger L
c. Use a capacitor with larger C
d. B or C would raise the resonance frequency
e. None of these would raise the resonance frequency
5. When an object is very far away from a concave mirror, an image is formed:
a. 1 focal length in front of the mirror
b. 1 focal length behind the mirror
c. 2 focal lengths in front of the mirror
d. On the face of the mirror
e. It%u2019s impossible to calculate without the object distance and focal length
6. An object%u2019s length (1.0 m) and width (2.0 m) is measured as shown at right by a person traveling along the
length of the object with velocity V, which is close to the speed of light. Which of the following are possible correct
values for the object%u2019s proper dimensions? http://s23.postimg.org/6ksvk2nzf/mc6.jpg
a. 1.0 m long by 2.0 m wide
b. 1.5 m long by 2.0 m wide
c. 0.8 m long by 2.0 m wide
d. 0.8 m long by 1.5 m wide
e. 1.0 m long by 1.5 m wide
7. A 250 W visible light does not eject electrons from a metal plate. Which type of source might start getting electrons ejected?
a. A more intense (500 W) visible light
b. A microwave source
c. An ultraviolet source
d. An infrared source
8. What energy photon must be absorbed by a hydrogen atom in order to move an electron from the n=1 to n=4 state?
a. 13.6 eV
b. 12.8 eV
c. 10.2 eV
d. 0.85 eV
e. 0.66 eV
9. Which of the following is the best explanation of the Heisenberg Uncertainty principle?
a. Electrons are in energy states surrounding an atom
b. Different types of radiation have different affects on living tissue
c. Time slows down an uncertain amount when you move fast
d. The more accurately you measure position, the less you know about
momentum
e. You never know when an nucleus is going to undergo radioactive decay
10. Which of the following is not an allowed value for the magnetic quantum number (ml) when the
principal quantum number (n) is 4?
a. 0
b. -1
c. -2
d. 4
e. 1
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