Physics Concept Questions (Test #5.31)

This is an introductory Physics test.
The test contains 30 multiple choice questions.
Give yourself up to 45 minutes to complete the test.

Double the amplitude of a wave and you necessarily change its
1. wavelength
2. frequency
3. speed
4. color
5. taste
6. none of the above
7. all of the above
Charge carriers in a metal are not protons because protons are
1. neutral
2. positively charged
3. negatively charged
4. introverts
5. not very socially inclined
6. tightly bound
Connect three light-bulbs in parallel with a battery and you draw a certain amount of current. Connect the three light-bulbs in series with the same battery and you draw ____ current.
1. the same
2. more
3. less
4. zero
5. infinite
6. none of the above
7. all of the above
A steady magnetic field runs from top to bottom of this page. An electron is moving from bottom to top of this page. The force on the electron, exerted by the magnetic field, is
1. in the same direction as the electron's motion
2. in the opposite direction as the electron's motion
3. from left to right on this page
4. from right to left on this page
5. perpendicular to the plan of this page
6. zero
7. infinite
8. none of the above
A proton vibrates from side-to-side 10 times a second. It generates an electromagnetic field with a frequency of
1. 1 Hz
2. 2 Hz
3. 10 Hz
4. 100 Hz
5. 10 meters
6. 100 meters
7. 10 meters/second
8. 100 meters/second
To most efficiently absorb an electromagnetic wave, the frequency of the wave should be ___ the natural frequency of the material being used to absorb the wave.
1. greater than
2. less than
3. equal to
4. zero compared to
5. infinite compared to
6. none of the above
7. all of the above
When electron clouds in a material are made to oscillate ____ waves are necessarily emitted
1. electronic
2. magnetic
3. de Broglie
4. electromagnetic
5. sound
6. ocean
7. ultraviolet
A surface that appears smooth to one kind of waves can appear rough to another kind of waves whose wavelength is ____ compared to the first kind.
1. zero
2. infinite
3. smaller
4. larger
5. the same
6. all of the above
7. none of the above
The bottom of a swimming pool appears closer to the surface than it actually is. This is caused by ___ of light.
1. refraction
2. fraction
3. reflection
4. flection
5. absorption
6. sorption
7. denaturization
About 9 AM, in the morning, a beam of sunlight enters the water of your swimming pool. The beam necessarily bends ___ as it enters the water.
1. by zero degrees
2. by 180 degrees
3. by 90 degrees
4. towards the normal
5. away from the normal
6. none of the above
7. all of the above
Can longitudinal waves experience polarization?
1. No
2. yes
3. sometimes
4. Depends on the speed of the wave
5. depends on the frequency of the wave
6. depends on the amplitude of the wave
7. none of the above
8. all of the above
When the axes of two polaroid filters are perpendicular to each other ___ of the incoming light can pass through the combined filters
1. all
2. none
3. half
4. red frequencies
5. blue frequencies
6. white frequencies
7. slower photons
8. faster photons
An example of interefernce is
1. a mirage
2. light bending when it enters water
3. light bending when it exits water
4. red sunset
5. orange harvest moon
6. rainbow in the sky
7. rainbow colors in gasoline on water
If destructive interference eliminates red from white light, what color is the remaining light likely to be ?
1. red
2. brown
3. black
4. white
5. cyan
6. purple
7. yellow
Laser light is
1. incoherent
2. coherent
3. polychromatic
4. inchromatic
5. out of phase
6. sometimes in phase, sometimes out of phase
7. always red
An non-excited atom absorbs a single red photon, and then emits another photon. The emitted photon can be
1. blue
2. ultraviolet
3. violet
4. green
5. white
6. infrared
A material is heated so it is "red-hot". The atoms in the material are
1. not vibrating
2. vibrating at an infinite range of frequencies
3. vibrating at about the same frequency
4. oscillating in figures of eight
5. oscillating in circles
6. oscillating in squares
What is the primary source of the electromagnetic radiation that is continually emitted by your body?
1. your magnetic personality
2. your charm bracelet
3. radioactive atoms in your bones
4. your body temperature vibrates your atoms
5. your body clock
6. your most recent meal
Which of the following entities is most prone to being impacted by quantum effects
1. a whale
2. a horse
3. a meteor
4. a meteorite
5. an egg
6. an electron
7. a baseball
An ultraviolet laser beam and an infrared laser beam have the same number of photons. Which beam has the lower energy?
1. ultraviolet
2. infrared
3. both have the same energy
4. neither has any energy
5. depends on the speed of the ultraviolet light
6. depends on the frequency of the infrared light
7. all of the above
A photon's energy is given by its frequency multipled by ___ constant
1. Henry's
2. Jame's
3. Newton's
4. Einstein's
5. Planck's
6. phonton's
7. energy
The following entites are all moving at the same speed. Based on quantum physics, which of these entities has the shortest wavelength?
1. an elephant
2. a space-ship
3. an astronaut
4. a mouse
5. an insect
6. the earth
7. an electron
8. a proton
Light from an incandescent light bulb (e.g., in a table lamp) is
1. monochromatic
2. coherent
3. in phase
4. all of these
5. none of these
An atom absorbs a photon with 5 units of energy. It then emits a photon with an energy that can be
1. 10 units
2. 8 units
3. 7 units
4. 5 to 6 units
5. 5 or less units
6. 10 to 20 units
7. 20 units
A bar of iron is heated until it is "red hot". This means that
1. All of the energy of the bar is being radiated as heat
2. All of the energy of the bar is being radiated as infrared waves
3. its molecules are vibrating at an infinite range of rates
4. its molecules are vibrating at a wide (but not infinite) range of rates
5. its molecules are vibrating at nearly identical rates
6. its molecules are not vibrating because they are fixed in place
7. its molecules are not vibrating because only the electrons can vibrate
Which of the following is not emitting electromagnetic radiation
1. A radio transmitter antenna
2. A TV transmitter antenna
3. A red hot piece of iron
4. Molten lead
5. The surface of the sun
6. An ice cube
7. All of these
8. None of these
Quantum uncertainty has the greatest effect on
1. a car
2. a human
3. an atom
4. an electron
5. an elephant
6. a whale
7. a molecule
A beam of yellow light and a beam of ultraviolet light have the same total energy. Which has fewer photons ?
1. yellow beam
2. ultraviolet beam
3. both have the same number of photons
4. neither has any photons
5. it is impossible for a yellow beam and an ultraviolet beam to have the same total energy
6. there is no such thing as energy
A photon's energy divided by its frequency
1. is higher if the photon's energy is higher
2. is lower if the photon's energy is lower
3. is higher if the photon's frequency is higher
4. is higher if the photon's frequency is lower
5. is a constant called the photon constant
6. is a constant called Planck's constant
7. is a constant called the gravitational constant
8. is a constant called Maxwell's constant
An elephant and a mouse are moving at the same speed. Which has the smaller wavelength?
1. Neither has a wavelength
2. Both have the same wavelength
3. If they have the same interests, then they are on the same wavelength
4. Depends on if they are travelling in the same direction or in different directions
5. The elephant
6. The mouse
7. The kangaroo

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