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Uses of the Bands, and lambda nu = c for GUJCET: 19 solved questions

Real GUJCET paper questions on uses of the bands, and lambda nu = c, part of electromagnetic waves. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2025. No sign-in needed to read them.

What this topic asks

• Wavelength, frequency and photon energy — 10 questions
• Uses and atmospheric effects — 9 questions

All 19 questions with solutions

• If the earth did not have atmosphere, the temperature would be GUJCET 2007
• The frequency of microwave used by a microwave oven to cook food or warm it up is GUJCET 2013
• If the wavelength of light is 4000 A, then the number of waves in 1 mm length will be _. GUJCET 2015
• In medicine, to destroy cancer cells rays are used. GUJCET 2017
• For a radiation of 9 GHz passing through air, the number of waves passing through 1 m length is GUJCET 2017
• A radio can tune into any station in the 6 MHz to 12 MHz band. What is the corresponding wavelength band? (c=… GUJCET 2022
• Cellular phones use radio waves to transmit voice communication in the band. GUJCET 2024
• are used in medicine to destroy cancer cells. GUJCET 2025
• Two opposite charged particles oscillate about their mean equilibrium position in free space with a frequency… GSEB Board July 2015; GSEB Board March 2018
• For a radiation of 6×10⁹ Hz passing through air, the wave number per 1 m length is . GSEB Board July 2015
• For a radiation of 6 GHz passing through air, the wave number (number of waves) per 1 m length is (1 GHz=10⁹… GSEB Board March 2019
• To destroy cancer cells are used. GSEB Board March 2020
• For a radiation of 600 MHz passing through air, the wave number per 1 m length is . GSEB Board March 2020 (old course)
• Two opposite charged particles oscillate about their mean equilibrium position in free space, with a frequenc… GSEB Board March 2020 (old course)
• is used for Lasik eye surgery. GSEB Board August 2020
• T.V. waves range from GSEB Board March 2023
• are used to kill germs in water purifiers. GSEB Board July 2023
• The electromagnetic waves in the range of wavelength from 3 mm to 100 cm are used for the purpose of satellit… RS Academy GUJCET booklet
• Astronomers have found that electromagnetic waves of wavelength 21 cm are continuously reaching the Earth's s… RS Academy GUJCET booklet