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A photocell is a device for generating an electrical current from light (see Figure 1). Figure 1 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second). Passage 7 2

A photocell is a device for generating an electrical current from light (see Figure 1). Figure 1 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second). Passage 7 3

A photocell is a device for generating an electrical current from light (see Figure 1). Figure 1 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second). Passage 7 4

Table 1 shows the results of 9 trials in which a photocell was exposed to light. 5

36.Based on Table 1, which of the following statements best explains the results of Trials 1–3 ? 1.The light was too intense to eject electrons from the metal in the photocell. 2.The light was too intense to eject photons from the metal in the photocell. 3.The energy per electron was too high to eject photons from the metal in the photocell. 4.The energy per photon was too low to eject electrons from the metal in the photocell. Passage 7 Questions 6

36.Based on Table 1, which of the following statements best explains the results of Trials 1–3 ? 1.The light was too intense to eject electrons from the metal in the photocell. 2.The light was too intense to eject photons from the metal in the photocell. 3.The energy per electron was too high to eject photons from the metal in the photocell. 4.The energy per photon was too low to eject electrons from the metal in the photocell. Passage 7 Questions 7

36.Based on Table 1, which of the following statements best explains the results of Trials 1–3 ? 1.The light was too intense to eject electrons from the metal in the photocell. 2.The light was too intense to eject photons from the metal in the photocell. 3.The energy per electron was too high to eject photons from the metal in the photocell. 4.The energy per photon was too low to eject electrons from the metal in the photocell. Passage 7 Questions 8

36.Based on Table 1, which of the following statements best explains the results of Trials 1–3 ? 1.The light was too intense to eject electrons from the metal in the photocell. 2.The light was too intense to eject photons from the metal in the photocell. 3.The energy per electron was too high to eject photons from the metal in the photocell. 4.The energy per photon was too low to eject electrons from the metal in the photocell. Passage 7 Questions 9

36.Based on Table 1, which of the following statements best explains the results of Trials 1–3 ? 1.The light was too intense to eject electrons from the metal in the photocell. 2.The light was too intense to eject photons from the metal in the photocell. 3.The energy per electron was too high to eject photons from the metal in the photocell. 4.The energy per photon was too low to eject electrons from the metal in the photocell. Passage 7 Questions 10

36.Based on Table 1, which of the following statements best explains the results of Trials 1–3 ? 1.The light was too intense to eject electrons from the metal in the photocell. 2.The light was too intense to eject photons from the metal in the photocell. 3.The energy per electron was too high to eject photons from the metal in the photocell. 4.The energy per photon was too low to eject electrons from the metal in the photocell. Passage 7 Questions 11

36.Based on Table 1, which of the following statements best explains the results of Trials 1–3 ? 1.The light was too intense to eject electrons from the metal in the photocell. 2.The light was too intense to eject photons from the metal in the photocell. 3.The energy per electron was too high to eject photons from the metal in the photocell. 4.The energy per photon was too low to eject electrons from the metal in the photocell. Passage 7 Questions 12

37. Consider the following results, obtained using 5.0 eV photons and the same photocell that is discussed in the passage. The maximum kinetic energy of the ejected electron, 3.1 eV, was not the expected value. The expected value was: eV. 2. between 0.1 eV and 0.8 eV. 3. between 0.9 eV and 2.9 eV. 4. greater than 3.0 eV. Passage 7 Questions 13

37. Consider the following results, obtained using 5.0 eV photons and the same photocell that is discussed in the passage. The maximum kinetic energy of the ejected electron, 3.1 eV, was not the expected value. The expected value was: eV. 2. between 0.1 eV and 0.8 eV. 3. between 0.9 eV and 2.9 eV. 4. greater than 3.0 eV. Passage 7 Questions 14

37. Consider the following results, obtained using 5.0 eV photons and the same photocell that is discussed in the passage. The maximum kinetic energy of the ejected electron, 3.1 eV, was not the expected value. The expected value was: eV. 2. between 0.1 eV and 0.8 eV. 3. between 0.9 eV and 2.9 eV. 4. greater than 3.0 eV. Passage 7 Questions ?

37. Consider the following results, obtained using 5.0 eV photons and the same photocell that is discussed in the passage. The maximum kinetic energy of the ejected electron, 3.1 eV, was not the expected value. The expected value was: eV. 2. between 0.1 eV and 0.8 eV. 3. between 0.9 eV and 2.9 eV. 4. greater than 3.0 eV. Passage 7 Questions ?

38.When 8.0 eV photons were shone on the photocell, electrons ejected from the metal in the photocell had a maximum kinetic energy of 4.9 eV. Based on this information and Table 1, the relative intensity of the light shone on the photocell: 1. was high. 2. was medium. 3. was low. 4. cannot be determined. Passage 7 Questions 17

38.When 8.0 eV photons were shone on the photocell, electrons ejected from the metal in the photocell had a maximum kinetic energy of 4.9 eV. Based on this information and Table 1, the relative intensity of the light shone on the photocell: 1. was high. 2. was medium. 3. was low. 4. cannot be determined. Passage 7 Questions 18

38.When 8.0 eV photons were shone on the photocell, electrons ejected from the metal in the photocell had a maximum kinetic energy of 4.9 eV. Based on this information and Table 1, the relative intensity of the light shone on the photocell: 1. was high. 2. was medium. 3. was low. 4. cannot be determined. Passage 7 Questions low medium high

38.When 8.0 eV photons were shone on the photocell, electrons ejected from the metal in the photocell had a maximum kinetic energy of 4.9 eV. Based on this information and Table 1, the relative intensity of the light shone on the photocell: 1. was high. 2. was medium. 3. was low. 4. cannot be determined. Passage 7 Questions low medium high 4.9

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 21

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 22

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 23 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second).

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 24 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second).

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 25 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second).

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 26 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second).

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 27 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second).

39.Based on the passage and Table 1, the work function of the metal used in the photocell was: eV eV eV eV. Passage 7 Questions 28 Each photocell contains a metal. A photon of light that strikes the metal can eject an electron from the metal if the photon's energy exceeds the metal's work function. The maximum kinetic energy the ejected electron can have is the photon's energy minus the metal's work function. The amount of electrical current varies with light's relative intensity (a measure of the number of photons with a given energy striking the metal each second).

40.In the photocell discussed in the passage, suppose the work function of the metal had been 5.1 eV. If the energy per photon had been the same as in Trials 7–9, the maximum kinetic energy of electrons that were ejected from the metal would have been: eV eV eV eV. Passage 7 Questions 29

40.In the photocell discussed in the passage, suppose the work function of the metal had been 5.1 eV. If the energy per photon had been the same as in Trials 7–9, the maximum kinetic energy of electrons that were ejected from the metal would have been: eV eV eV eV. Passage 7 Questions 30

40.In the photocell discussed in the passage, suppose the work function of the metal had been 5.1 eV. If the energy per photon had been the same as in Trials 7–9, the maximum kinetic energy of electrons that were ejected from the metal would have been: eV eV eV eV. Passage 7 Questions 31

40.In the photocell discussed in the passage, suppose the work function of the metal had been 5.1 eV. If the energy per photon had been the same as in Trials 7–9, the maximum kinetic energy of electrons that were ejected from the metal would have been: eV eV eV eV. Passage 7 Questions 32

40.In the photocell discussed in the passage, suppose the work function of the metal had been 5.1 eV. If the energy per photon had been the same as in Trials 7–9, the maximum kinetic energy of electrons that were ejected from the metal would have been: eV eV eV eV. Passage 7 Questions 33

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