Which force field can increase a moving electron’s speed?
Answer all the questions in more details for full credit. Half the credit will be deducted from your grade if you don’t provide an explanation even if you choose the right answer

1) Which force field can increase a moving electron’s speed?
A) electric field B) magnetic field C) both of these D) neither of these

2) Solar winds headed in Earth’s direction are deviated mainly by
A) the troposphere. B) Earth’s magnetic field.
C) Earth’s radiation belts. D) the upper atmosphere.

3) Pigeons navigate primarily by
A) ultra-high-pitched sounds.
B) a good memory.
C) magnetic sensors in their heads.
D) a keen sense of smell.
E) none of the above

4) To weaken a bar magnet
A) put it in hot flames.
B) drop it on a hard surface.
C) whack it with a hammer.
D) all of the above
E) none of the above

5) Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a

A) south pole. B) north pole. C) either of these D) neither of these

6) A compass needle in a magnetic field
A) may experience a pair of torques.
B) experiences a torque.
C) experiences a pair of torques.

7) Wood does not have magnetic properties because it contains no
A) moving electrons. B) magnetic domains.
C) iron or other metals. D) none of the above

8) An iron nail is more strongly attracted to the
A) north pole of a magnet.
B) south pole of a magnet.
C) either of these
D) neither of these

9) The amount of current produced by electromagnetic induction depends on the
A) resistance of the circuit to which it is connected.
B) amount of induced voltage.
C) both of these
D) neither of these

10) When voltage is induced in a coil of wire, current is
A) not induced.
B) cancelled.
C) also, induced.

11)A turbogenerator produces
A) energy.
B) power.
C) neither, but transforms energy from one form to another.
D) none of the above

12) The rate at which energy is transferred is
A) electromagnetic induction.
B) power.
C) transformation.
D) none of the above

13) An efficient step-down transformer decreases
A) power. B) energy. C) both of these D) neither of these

14) A step-up transformer steps up voltage by ten times. Neglecting slight losses, if 100 W of power go into the primary coil, the power coming from the secondary coil is

A) 10 W.
B) 1 W.
C) 1000 W.
D) 100 W.
E) none of the above

15) Underlying the concept of self-induction is
A) Maxwell’s law. B) Ohm’s law.
C) Faraday’s law. D) all of these about equally

16)Faraday’s law was extended by Maxwell toward
A) changes in electric fields.
B) changes in magnetic fields.
C) both of these
D) neither of these

17) The shortest plane mirror in which you can see your entire image is
A) about 1/3 your height.
B) dependent on your distance from the mirror.
C) about 3/4 your height.
D) equal to your height.
E) half your height.

18) Refraction results from differences in light’s
A) incident angles.
B) frequency.
C) speed.
D) all of the above
E) none of the above

19) The average speed of light is greatest in
A) red glass.
B) blue glass.
C) same in all of these
D) green glass.
E) orange glass.

20) If the speed of light in a sphere is 2 × 108 m/s, its index of refraction is

A) 0.67. B) 0.50. C) 1.5. D) 2.0. E) 1.0.

21) When light is refracted, there is a change in its
A) wavelength. B) frequency. C) both of these D) neither of these

22) The critical angle for a transparent material is the angle at and beyond which all light within the material at its upper surface is

A) dispersed. B) reflected. C) absorbed. D) diffused. E) refracted.

23) Which of the following can be projected onto a viewing screen?
A) a virtual image B) a real image C) both of these D) neither of these

24) The image of the “infinitely-far-away” Sun produced by a converging lens appears
A-beyond the focal point.
B) at the focal point.
C) between the lens and the focal point.

25) If you cover half a camera lens with opaque tape, the images produced will be
A) cut in half. B) only dimmer. C) both of these D) neither of these

26) Both electrons and protons have equal-magnitude
A) charge.
B) mass.
C) energy.
D) all of the above
E) none of the above

27) The spectral lines of atomic spectra are
A) images of the slit in a spectroscope.
B) as an identity of atoms as fingerprints are of people.
C) orderly, and even predictable.
D) all of the above
E) none of the above

28) The Bohr model of the atom is akin to a
A) miniature solar system.
B) central heavy ball with lighter balls connected by springs.
C) blob of plum pudding, where raisins represent electrons.
D) D) all of the above

29) The discreteness of orbits of electrons in an atom are due to
A) wave interference.
B) electric charge quanta
C) momentum conservation.
D) all the above
E) none of the above

30) The finding that electrons in an atom occupy a volume much greater than the volume of the nucleus is best explained by

A) angular momentum conservation.
B) electromagnetic forces.
C) the wave nature of the electron.
D) relative sizes of electrons and nuclei.
E) none of the above

31) X-rays are similar to
A) alpha rays.
B) gamma rays.
C) beta rays.
D) all of the above
E) none of the above

32) Which is heated in its interior by nuclear processes?

A) Sun B) Earth C) both of these D) neither of these

33) Gamma rays are emitted by way of
A) transitions within an atom’s innermost electrons.
B) ionizing radiation.
C) transitions within the atomic nucleus.
D) none of the above

34) Which of these will penetrate into lead?
A) gamma ray. B) beta particle C) alpha particle D) all of the above

35) Rays with the shortest wavelengths have the
A) lowest frequencies but highest energies.
B) lowest frequencies and energies.
C) highest frequencies and energies.

36) The radiation source closest to us originates in
A) all kinds of power plants.
B) medical treatments.
C) our own bodies.
D) none of the above

37) The natural background radiation we personally encounter is
A) about a quarter. B) more than half. C) a trace amount. D) about half.

38) A quark is a fundamental particle
A) that makes up a nucleon.
B) not composed of smaller parts.
C) much smaller than a nucleon.
D) all of the above
E) none of the above

39) Electric forces within an atomic nucleus tend to
A) push it apart. B) hold it together. C) neither of these

40) Nuclear stability is related to the balance between
A) attracting and repelling forces in the nucleus.
B) positive and negative ionic forces.
C) both of these
D) neither of these

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Your email address will not be published. Required fields are marked *

Which force field can increase a moving electron’s speed?
Answer all the questions in more details for full credit. Half the credit will be deducted from your grade if you don’t provide an explanation even if you choose the right answer

1) Which force field can increase a moving electron’s speed?
A) electric field B) magnetic field C) both of these D) neither of these

2) Solar winds headed in Earth’s direction are deviated mainly by
A) the troposphere. B) Earth’s magnetic field.
C) Earth’s radiation belts. D) the upper atmosphere.

3) Pigeons navigate primarily by
A) ultra-high-pitched sounds.
B) a good memory.
C) magnetic sensors in their heads.
D) a keen sense of smell.
E) none of the above

4) To weaken a bar magnet
A) put it in hot flames.
B) drop it on a hard surface.
C) whack it with a hammer.
D) all of the above
E) none of the above

5) Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a

A) south pole. B) north pole. C) either of these D) neither of these

6) A compass needle in a magnetic field
A) may experience a pair of torques.
B) experiences a torque.
C) experiences a pair of torques.

7) Wood does not have magnetic properties because it contains no
A) moving electrons. B) magnetic domains.
C) iron or other metals. D) none of the above

8) An iron nail is more strongly attracted to the
A) north pole of a magnet.
B) south pole of a magnet.
C) either of these
D) neither of these

9) The amount of current produced by electromagnetic induction depends on the
A) resistance of the circuit to which it is connected.
B) amount of induced voltage.
C) both of these
D) neither of these

10) When voltage is induced in a coil of wire, current is
A) not induced.
B) cancelled.
C) also, induced.

11)A turbogenerator produces
A) energy.
B) power.
C) neither, but transforms energy from one form to another.
D) none of the above

12) The rate at which energy is transferred is
A) electromagnetic induction.
B) power.
C) transformation.
D) none of the above

13) An efficient step-down transformer decreases
A) power. B) energy. C) both of these D) neither of these

14) A step-up transformer steps up voltage by ten times. Neglecting slight losses, if 100 W of power go into the primary coil, the power coming from the secondary coil is

A) 10 W.
B) 1 W.
C) 1000 W.
D) 100 W.
E) none of the above

15) Underlying the concept of self-induction is
A) Maxwell’s law. B) Ohm’s law.
C) Faraday’s law. D) all of these about equally

16)Faraday’s law was extended by Maxwell toward
A) changes in electric fields.
B) changes in magnetic fields.
C) both of these
D) neither of these

17) The shortest plane mirror in which you can see your entire image is
A) about 1/3 your height.
B) dependent on your distance from the mirror.
C) about 3/4 your height.
D) equal to your height.
E) half your height.

18) Refraction results from differences in light’s
A) incident angles.
B) frequency.
C) speed.
D) all of the above
E) none of the above

19) The average speed of light is greatest in
A) red glass.
B) blue glass.
C) same in all of these
D) green glass.
E) orange glass.

20) If the speed of light in a sphere is 2 × 108 m/s, its index of refraction is

A) 0.67. B) 0.50. C) 1.5. D) 2.0. E) 1.0.

21) When light is refracted, there is a change in its
A) wavelength. B) frequency. C) both of these D) neither of these

22) The critical angle for a transparent material is the angle at and beyond which all light within the material at its upper surface is

A) dispersed. B) reflected. C) absorbed. D) diffused. E) refracted.

23) Which of the following can be projected onto a viewing screen?
A) a virtual image B) a real image C) both of these D) neither of these

24) The image of the “infinitely-far-away” Sun produced by a converging lens appears
A-beyond the focal point.
B) at the focal point.
C) between the lens and the focal point.

25) If you cover half a camera lens with opaque tape, the images produced will be
A) cut in half. B) only dimmer. C) both of these D) neither of these

26) Both electrons and protons have equal-magnitude
A) charge.
B) mass.
C) energy.
D) all of the above
E) none of the above

27) The spectral lines of atomic spectra are
A) images of the slit in a spectroscope.
B) as an identity of atoms as fingerprints are of people.
C) orderly, and even predictable.
D) all of the above
E) none of the above

28) The Bohr model of the atom is akin to a
A) miniature solar system.
B) central heavy ball with lighter balls connected by springs.
C) blob of plum pudding, where raisins represent electrons.
D) D) all of the above

29) The discreteness of orbits of electrons in an atom are due to
A) wave interference.
B) electric charge quanta
C) momentum conservation.
D) all the above
E) none of the above

30) The finding that electrons in an atom occupy a volume much greater than the volume of the nucleus is best explained by

A) angular momentum conservation.
B) electromagnetic forces.
C) the wave nature of the electron.
D) relative sizes of electrons and nuclei.
E) none of the above

31) X-rays are similar to
A) alpha rays.
B) gamma rays.
C) beta rays.
D) all of the above
E) none of the above

32) Which is heated in its interior by nuclear processes?

A) Sun B) Earth C) both of these D) neither of these

33) Gamma rays are emitted by way of
A) transitions within an atom’s innermost electrons.
B) ionizing radiation.
C) transitions within the atomic nucleus.
D) none of the above

34) Which of these will penetrate into lead?
A) gamma ray. B) beta particle C) alpha particle D) all of the above

35) Rays with the shortest wavelengths have the
A) lowest frequencies but highest energies.
B) lowest frequencies and energies.
C) highest frequencies and energies.

36) The radiation source closest to us originates in
A) all kinds of power plants.
B) medical treatments.
C) our own bodies.
D) none of the above

37) The natural background radiation we personally encounter is
A) about a quarter. B) more than half. C) a trace amount. D) about half.

38) A quark is a fundamental particle
A) that makes up a nucleon.
B) not composed of smaller parts.
C) much smaller than a nucleon.
D) all of the above
E) none of the above

39) Electric forces within an atomic nucleus tend to
A) push it apart. B) hold it together. C) neither of these

40) Nuclear stability is related to the balance between
A) attracting and repelling forces in the nucleus.
B) positive and negative ionic forces.
C) both of these
D) neither of these

Leave a Reply

Your email address will not be published. Required fields are marked *