Study sets, textbooks, questions
Upgrade to remove ads
Phys Concept Questions Exam #2
Terms in this set (17)
Which one of the following statements concerning resistors in series is true?
- The rate at which charge flows through each resistor depends on its resistance.
- The total current through the resistors is the sum of the current through each resistor.
- The current through each resistor is the same.
- the current through each resistor is the same
Which of the following statements concerning resistors that are wired in parallel is true?
- the current through each resistor is necessarily the same
- the equivalent resistance for the resistors in the circuit is the product of the individual resistances
- the voltage across each resistor is necessarily the same
- the equivalent resistance for the resistance in the circuit is the average of the individual resistances
- the equivalent resisitance for the resistors in the circuit is the sum of the inidivual resistances
the vlotage across each resistor is necessarily the same
The following four equations are supposed to result from applying Kirchhoff's junction rule to the four junctions in the circuit shown in the drawing. However, one of the equations is written incorrectly. Which one is it?
- A: I4 + I5 = I1
- B: I1 + I2 = I3
- C: I6 = I3 + I5
- D: I2 = I4 + I6
Three capacitors are identical, each having a capacitance C. Two of them are connected in series. Then, this series combination is connected in parallel with the third capacitor. What is the equivalent capacitance of the entire connection?
At a location near the equator, the earth's magnetic field is horizontal and points north. An electron is moving vertically upward from the ground. What is the direction of the magnetic force that acts on the electron?
- The magnetic force is 0
In a certain circuit containing a battery and a resistor, Ohm's law is obeyed. An instrument to measure the current in the circuit, an ammeter, is connected in between one of the terminals of the battery and one end of the resistor. The ammeter indicates that the current in the circuit is I. The battery is then removed and replaced with another battery. This time, the ammeter indicates the current is 2I. Which one of the following statements concerning the resistor is true?
a) When the second battery was placed in the circuit, the resistance increased to twice its initial value.
b) When the second battery was placed in the circuit, the resistance decreased to one half its initial value.
c) When the second battery was placed in the circuit, the resistance increased to four times its initial value.
d) When the second battery was placed in the circuit, the resistance did not change.
When the second battery was placed in the circuit, the resistance did not change
In the circuit shown, the two bulbs A and B are identical (same resistance). Compared to bulb A, 23 A. bulb B glows more brightly.
B. bulb B glows less brightly.
C. bulb B glows equally brightly.
D. the answer depends on whether the mobile charges in the wires are positively or negatively charged.
E. not enough information to decide
C. bulb B glows equally brightly
In the circuit shown in (a), the two bulbs A and B are identical. Bulb B is removed and the circuit is completed as shown in (b). Compared to the brightness of bulb A in figure (a), bulb A in figure (b) is
A. just as bright.
B. less bright.
D. any of the above, depending on the rated wattage of the bulbs
Three identical light bulbs are connected to a source of emf as shown. Which bulb glows the brightest?
A. Light bulb A glows the brightest. B. Light bulb B glows the brightest. C. Light bulb C glows the brightest. D. Both light bulbs B and C are equally bright and are brighter than light bulb A.
E. All bulbs are equally bright.
A: Light bulb A glows the brightest
A battery, a capacitor, and a resistor are connected in series. Which of the following affect(s) the maximum charge stored on the capacitor?
A. the emf (voltage) of the battery
B. the capacitance C of the capacitor
C. the resistance R of the resistor
D. both A and B
E. all of A, B, and C
D: both A and B
An electron traveling due east in a region that contains only a magnetic field experiences a vertically downward force, toward the surface of the earth. What is the direction of the magnetic field?
a) upward, away from the earth
b) downward, toward the earth
c) due south
d) due west
e) due north
e) due north
A beam of electrons is coming straight toward you. You place a bar magnet directly above the beam as shown. At the location of the beam of electrons, the magnetic field from the magnet points straight down. Which way will the electron beam be deflected?
A. upward, toward the magnet
B. downward, away from the magnet C. to the left side of the screen
D. to the right side of the screen
E. It won't deflect at all.
C: to the left of the screen
A beam of argon atoms is coming straight toward you. You place a magnet as shown directly above the beam. The magnetic field from the magnet points straight down. Which way will the argon beam deflect?
C. to the left
D. to the right
E. It won't deflect at all.
C: to the left side of the screen
In what direction would a B-field have to point for a beam of electrons moving to the right to go undeflected through a region where there is a uniform electric field pointing vertically upward? Concept Question 4
a) Up (parallel to E)
b) Down (antiparallel to E)
c) Into the page
d) Out of the page
e) Impossible to accomplish
d) out of the page
A vertical wire carries a current and is in a vertical magnetic field. What is the direction of the force on the wire?
D.Into the page
E. Out of the page
E: out of the page
The currents in these wires have the same magnitude but opposite direction. Of the four directions shown, what is the direction of the net magnetic field at point P? A.Direction 1
B. Direction 2
C. Direction 3
E. The B field is zero
C: direction 3
Each of the wires in the figures below carry the same current, either into or out of the page. In which case is the magnetic field at the center of the square greatest?
A. Arrangement 1
B. Arrangement 2
C. Arrangement 3
D. Same for all
B. Arrangement 2
Other sets by this creator
CLAS 116: Quiz #2
Medical Term: Quiz 1
Last Phys Lab Quiz!!!
BIOS 213 Exam 4
Other Quizlet sets
Exam 3- A&P2
4th Quarter Quiz
Unit 7 Test