physics again- darn you
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bright fringe
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in a double slit experiment, a wave from one slit arrives at a point on a screen one wavelength behind the wave from the other slit. What is observed at that point?
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dark fringe
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In a double slit experiment, a wave from one slit arrives at a point on a screen one-half wavelength behind the wave from the other slit. What is observed at that point?
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incandescent light is incoherent
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If two lightbulbs are placed side by side, no interference is observed because
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phase relationship
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coherence is the property by which two waves with identical wavelengths maintain a constant
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H
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In the figure above, which fringe represents a second-order maximum
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O
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In the figure above, O is the angle between the central maximum and the first-order maximum. What is the angle between fringes D and F?
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F would shift to the right
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In the double slit interference experiment that produced the figure above, the same slits are illuminated with light of greater wavelength. Which of the following would occur to the pattern shown in the figure?
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F would shift to the right
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In the double slit interference experiment that produced the figure above, the two slits are moved closer. Which of the following would occur to the pattern shown in the figure?
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sources must be coherent and monochromatic
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to produce a sustained interference pattern by light waves from multiple sources, which condition or conditions must be met?
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where the crest from one wavelength overlaps the trought from the other
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two beams of coherent light are shining on the same sheet of white paper. When referring to the crests and troughs of such waves, where will darkness appear on the paper?
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it decreases
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when a positive charge moves in the direction of the electric field, what happens to the electrical potential energy associated with the charge?
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The potential difference between the plates is equal to the applied potential difference
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charge buildup between the plates of a capacitator stops when
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negative charge, positive charge
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a capacitator consists of two metal plates; _____ is stored on one plate, and ___ is stored on the other.
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2.2*10 to the -6th
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A 0.25 nanoF capacitator is connected to a 9 V battery. What is the charge on the capacitator?
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4C
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A parallel-plate capacitator has a capacitance of C F. If the area of the plates is doubled while the distance between the plates is halved, the new capacitance will be
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3.6*10 to the -5
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A 0.50 nanoF capacitator is connected to a 12 V battery. Use the expression PE=.5C(change in V squared) to determine how much electrical potential energy is stored in the capacitator.
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the current decreases
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how is current affected if the nuber of charge carriers decreases?
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the current increases
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how is current affected if the time interval over which the charge passes through a given area decreases while the amount of charge remains the same?
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1.33 A
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the amount of charge that moves through the filament of a lightbulb in 2 seconds is 2.67 C. What is the current in the lightbulb?
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the move in zigzag patterns
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when electrons move through a metal conductor
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25 V
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what is the potential difference across a5.0 omega resistor that carries a current of 5.0 A?
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Ohm's Law
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which of the following does NOT affect a material's resistance?
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a copper wire 5 cm in length
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which of the following wires would have the least resistance, assuming that all the wires have the same cross-sectional area?
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a copper wire 5 cm in length at 10 degrees celcius
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which of the following wires would have the least resistance
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rate that they give off heat and light
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the power ratings on lightbulbs are measures of the
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converts less electrical energy to heat and light than a 100 W lightbulb
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when compared in a given time interval with other lightbulbs connected to a 120 V circuit, a 60 W lightbulb
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the resistance, the current, and the time the circuit operates
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Which set of information will allow you to calculate the kilowatt*hour usage?
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0.62 A
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If a 75 W lightbulb operaes at a voltage of 120 V, what is the current of the bulb?
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9 omega
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If a 325 W heater has a current of 6.0 A, what is the resistance of the heating element?
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11 omega
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An electric toaster requires 1100 W at 110 V. What is the resistance of the heating coil?
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shows the parts of a circuit and how the parts connect to each other
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Which of the following is the best description of a schematic diagram?
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12 V
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If the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire CD player?
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The terminal voltage of a bettery is equal to its emf
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Which of the following statements about a battery as a source of electric current is NOT true?
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The equivalent resistance is equal to the sum of the individual resistances
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a circuit is composed of a resistors wired in series. What is the relationship between the equivalent resistance of the circuit and the resistance of the individual resistors?
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the equivalent resistance is half the value of a single resistor
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two resistors having the same resistance value are wired in parallel.. How does the equivalent resistance compare to the resistance value of a single resistor?
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simplifying the circuit into groups of series and parallel circuits
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The equivalent resistance of a complex circuit is usually determined by
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8.0 omega
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Two resistors with values of 6.0 omega and 12 omega are connected in parallel. this combination is connected in series with a 4.0 omega resistor. What is the equivalent resistance of this combination?
