Student Workbook for College Physics: A Strategic Approach Volume 1 (Chs. 1-16)
3rd Edition
ISBN: 9780321908865
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Chapter 28, Problem 9CQ
a.
To determine
Whether current changes when light intensity doubles.
b.
To determine
Whether current changes when anode cathode potential difference is increased.
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A tungesten filament is heated to 2600.0 ∘C. Calculate the wavelength for which the emission spectrum of the filament is maximum assuming that it fully absorbes light at all wavelengths.
Select one:
a.λmax=1009 nm
b.λmax=1087 nm
c.λmax=1137 nm
d.λmax=1115 nm
In a Millikan oil-drop experiment, a particular oil drop weighs 4.37×10^−14 N. The parallel plates are separated by a distance of 1.80 cm.When the potential difference between the plates is 546 V, the drop is suspended.
a. What is the net charge on the oil drop?
b. If the upper plate is positive, how many excess electrons are on the oil drop?
550 nm is the approximate average wavelength of visible light.a. What is the energy of a photon with a wavelength of 550 nm?b. A 40 W incandescent lightbulb emits about 1 J of visible light energy every second. Estimate the number of visible light photons emitted per second.
Chapter 28 Solutions
Student Workbook for College Physics: A Strategic Approach Volume 1 (Chs. 1-16)
Ch. 28 - Prob. 1CQCh. 28 - Prob. 2CQCh. 28 - Prob. 3CQCh. 28 - Prob. 4CQCh. 28 - Prob. 5CQCh. 28 - Prob. 6CQCh. 28 - Prob. 7CQCh. 28 - Prob. 8CQCh. 28 - Prob. 9CQCh. 28 - Prob. 10CQ
Ch. 28 - Prob. 11CQCh. 28 - Prob. 12CQCh. 28 - Prob. 13CQCh. 28 - Prob. 14CQCh. 28 - Prob. 15CQCh. 28 - Prob. 16CQCh. 28 - Prob. 17CQCh. 28 - Prob. 18CQCh. 28 - Prob. 19CQCh. 28 - Prob. 20CQCh. 28 - Prob. 21CQCh. 28 - Prob. 22CQCh. 28 - Prob. 23CQCh. 28 - Prob. 24CQCh. 28 - Prob. 25CQCh. 28 - Prob. 26MCQCh. 28 - Prob. 27MCQCh. 28 - Prob. 28MCQCh. 28 - Prob. 29MCQCh. 28 - Prob. 30MCQCh. 28 - Prob. 31MCQCh. 28 - Prob. 32MCQCh. 28 - Prob. 33MCQCh. 28 - Prob. 34MCQCh. 28 - Prob. 35MCQCh. 28 - Prob. 1PCh. 28 - Prob. 2PCh. 28 - Prob. 3PCh. 28 - Prob. 4PCh. 28 - Prob. 5PCh. 28 - Prob. 6PCh. 28 - Prob. 7PCh. 28 - Prob. 8PCh. 28 - Prob. 9PCh. 28 - Prob. 10PCh. 28 - Prob. 11PCh. 28 - Prob. 12PCh. 28 - Prob. 13PCh. 28 - Prob. 14PCh. 28 - Prob. 15PCh. 28 - Prob. 16PCh. 28 - Prob. 17PCh. 28 - Prob. 18PCh. 28 - Prob. 19PCh. 28 - Prob. 20PCh. 28 - Prob. 21PCh. 28 - Prob. 22PCh. 28 - Prob. 23PCh. 28 - Prob. 24PCh. 28 - Prob. 25PCh. 28 - Prob. 26PCh. 28 - Prob. 27PCh. 28 - Prob. 28PCh. 28 - Prob. 29PCh. 28 - Prob. 30PCh. 28 - Prob. 31PCh. 28 - Prob. 32PCh. 28 - Prob. 33PCh. 28 - Prob. 34PCh. 28 - Prob. 35PCh. 28 - Prob. 36PCh. 28 - Prob. 37PCh. 28 - Prob. 38PCh. 28 - Prob. 39PCh. 28 - Prob. 40PCh. 28 - Prob. 41PCh. 28 - Prob. 42PCh. 28 - Prob. 43PCh. 28 - Prob. 44PCh. 28 - Prob. 45PCh. 28 - Prob. 46PCh. 28 - Prob. 47PCh. 28 - Prob. 48PCh. 28 - Prob. 49PCh. 28 - Prob. 50GPCh. 28 - Prob. 51GPCh. 28 - Prob. 52GPCh. 28 - Prob. 53GPCh. 28 - Prob. 54GPCh. 28 - Prob. 55GPCh. 28 - Prob. 56GPCh. 28 - Prob. 57GPCh. 28 - Prob. 58GPCh. 28 - Prob. 59GPCh. 28 - Prob. 60GPCh. 28 - Prob. 61GPCh. 28 - Prob. 62GPCh. 28 - Prob. 63GPCh. 28 - Prob. 64GPCh. 28 - Prob. 65GPCh. 28 - Prob. 66GPCh. 28 - Prob. 67GPCh. 28 - Prob. 68GPCh. 28 - Prob. 69GPCh. 28 - Prob. 70GPCh. 28 - Prob. 71GPCh. 28 - Prob. 72GPCh. 28 - Prob. 73GPCh. 28 - Prob. 74GPCh. 28 - Prob. 75GPCh. 28 - Prob. 76GPCh. 28 - Prob. 77GPCh. 28 - Prob. 78GPCh. 28 - Prob. 79GPCh. 28 - Prob. 80GPCh. 28 - Prob. 81GPCh. 28 - Prob. 82GPCh. 28 - Prob. 83GPCh. 28 - Prob. 84GPCh. 28 - Prob. 85MSPPCh. 28 - Prob. 86MSPPCh. 28 - Prob. 87MSPPCh. 28 - Prob. 88MSPP
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- a.) In what part of the EM spectrum would a photon of energy 7.7 ✕ 10−23 J be found? b.) What is its energy in electronvolts?arrow_forwardle (mA) 50 mW/cm2 TU40 mW/cm² 30 mW/cm² (a) Zero (b) 10 mW/cm² (c) 20 mW/cm² (d) 30 mW/cm² 20 mW/cm² 10 mW/cm2 Dark current V₁: (V) Figure 3 A phototransistor with the characteristic shown in Figure 3 has a supply voltage of 20 V and a collector load resistance of 2.5 Kn. Determine the output voltage when the illumination level isarrow_forwardAsap plzzzzzarrow_forward
- 13.a. In a Compton scattering, a photon of wavelength (439) nm is collided with an electron and scattered through an angle (69)°. Calculate the energy transferred to the electron in this collision. b. A rectangular block of copper having dimensions (20.5) cm × (20.5) cm × (49) cm. If the resistivity (?) of copper is 17.2 n Ω?, determine its resistance.arrow_forward550 nm is the average wavelength of visible light.a. What is the energy of a photon with a wavelength of 550 nm?b. A typical incandescent lightbulb emits about 1 J of visible light energy every second. Estimate the number of visible photons emitted per second.arrow_forwardA photoresistor is used in a voltage divider as R2. V = 9.0 V and R1 = 500 Ω. a) What is the output voltage, V2, across R2, when a bright light strikes the photoresistor and R2 = 475 Ω? b) When the light is dim, R2 = 4.0 kΩ. What is V2? c) When the photoresistor is in total darkness, R2 = 0.40 MΩ (0.40 x 106 Ω). What is V2?arrow_forward
- 4. A laser with a power of 1.0 mW has a beam radius of 1.0 mm. What is the peak value of the electric field in that beam?a. 490 V/mb. 840 V/mc. 65 V/md. 120 V/me. 22 V/marrow_forwardIn Millikan's oil-drop experiment, one looks at a small oil drop held motionless between two plates. Take the voltage between the plates to be 2247 V and the plate separation to be 1 cm. The oil drop (of density 0.81 g/cm3) has a diameter of 4.0 ×10-6 m. Find the charge on the drop, in terms of electron units. earrow_forwardThe work functions of metals A, B, and C are 3.0 eV, 4.0 eV, and 5.0 eV, respectively. UV light shines on all three metals, causing electrons to be emitted. Rank in order, from largest to smallest, the stopping voltages for A, B, and C.arrow_forward
- C Which choice in the list below corresponds to a correct unit of Planck's constant? O a. J/s O b. J.s² O c. eV.s d. eV/sarrow_forwardH7arrow_forwardGamma rays are photons with very high energy.a. What is the wavelength of a gamma-ray photon with energy 625 keV?b. How many visible-light photons with a wavelength of 500 nm would you need to match the energy of this one gamma-ray photon?arrow_forward
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