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Chapter 1 - Electric Current, Ohms Law and Kirchhoffs Laws

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Chapter 2 - Magnetic Effects of Electric Current and Measuring Instruments

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Chapter 3 - Electromagnetic Induction and AC Dynamo and Transformer

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Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 1: Blackbody Radiation, Max Planck Hypothesis and the Photon — Picture questions (exam style)

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  • Questions count: 13
  • Passing grade: 60%
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1.
The graph shows black-body radiation at 5800 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 5800 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
500 nm
250 nm
2.00×10−3 nm
16800 nm
2.
The curves are for a black body at two temperatures. Curve 1 is at 6000 K. What is the temperature of curve 2? (use the peak positions)
The curves are for a black body at two temperatures. Curve 1 is at 6000 K. What is the temperature of curve 2? (use the peak positions)
4000 K
18000 K
2000 K
8000 K
3.
A black body at 6000 K changes to 3000 K (curves shown). Which option is correct?
A black body at 6000 K changes to 3000 K (curves shown). Which option is correct?
λmax × 1/2, radiated power × 1/8
λmax × 2, radiated power × 1/16
λmax × 4, radiated power × 1/8
λmax × 2, radiated power × 1/2
4.
The graph shows black-body radiation at 6000 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 6000 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
17400 nm
2.07×10−3 nm
483 nm
242 nm
5.
The graph shows black-body radiation at 7000 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 7000 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
2.41×10−3 nm
207 nm
20300 nm
414 nm
6.
The graph shows black-body radiation at 3000 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 3000 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
967 nm
1.03×10−3 nm
483 nm
8700 nm
7.
The graph shows black-body radiation at 3500 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 3500 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
10100 nm
414 nm
829 nm
1.21×10−3 nm
8.
The graph shows black-body radiation at 8000 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 8000 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
2.76×10−3 nm
181 nm
23200 nm
362 nm
9.
The graph shows black-body radiation at 4500 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 4500 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
322 nm
13000 nm
1.55×10−3 nm
644 nm
10.
The graph shows black-body radiation at 10000 K. Find the wavelength of peak intensity (Wien constant 2.9×10−3 m K).
The graph shows black-body radiation at 10000 K. Find the wavelength of peak intensity (Wien constant 2.9×10⁻³ m K).
290 nm
145 nm
3.45×10−3 nm
29000 nm
11.
The curves are for a black body at two temperatures. Curve 1 is at 6000 K. What is the temperature of curve 2? (use the peak positions)
The curves are for a black body at two temperatures. Curve 1 is at 6000 K. What is the temperature of curve 2? (use the peak positions)
14400 K
2500 K
8500 K
4250 K
12.
The curves are for a black body at two temperatures. Curve 1 is at 3000 K. What is the temperature of curve 2? (use the peak positions)
The curves are for a black body at two temperatures. Curve 1 is at 3000 K. What is the temperature of curve 2? (use the peak positions)
4500 K
9000 K
6000 K
1500 K
13.
The curves are for a black body at two temperatures. Curve 1 is at 3000 K. What is the temperature of curve 2? (use the peak positions)
The curves are for a black body at two temperatures. Curve 1 is at 3000 K. What is the temperature of curve 2? (use the peak positions)
15000 K
7500 K
12000 K
750 K
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