Previous year MCQs

General science UPPSC 2010 GS-I
Question

What type of electromagnetic radiation is used in the remote control of a television?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Infrared

Detailed Solution:

The correct answer is “Infrared”.
Infrared radiation is used in the remote control of a television. Infrared is a type of electromagnetic radiation (EMR) with longer wavelengths than visible light, making it invisible to the human eye.

Radio Waves (Lowest frequency) < Microwaves < Infrared Radiation < Visible Ligh < Ultraviolet Radiation < X-rays < Gamma Rays (Highest frequency)

Similar Questions:

When a glass rod is placed in steam, its length increases but its width:
  1. A) remains unchanged
  2. B) decreases
  3. C) increases
  4. D) becomes irregular
Why do pendulum clocks usually lose time in summer?
  1. A) Due to longer days in summer
  2. B) Due to friction caused by coils
  3. C) Length of the pendulum increases, increasing the time period of unit oscillation
  4. D) The weight of the pendulum increases in summer
Which one of the following is NOT correctly matched?(Substance) (Use)
  1. A) Silver bromide - Artificial photosynthesis
  2. B) Silver iodide - Artificial rain
  3. C) Lithium bicarbonate - Treatment of rheumatism
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The length of its day and tilt of its axis are almost identical to those of the earth. This is true of:
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  2. B) Neptune
  3. C) Saturn
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  2. B) Apple
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Who had composed the "Gita Govinda"?
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Match List-I with List-II and select the correct answer from the codes given below the lists:
List-I List-II

A. Etna - 1. Ross Island
B. Vesuvius - 2. Ecuador
C. Erebus - 3. Italy
D. Cotopaxi - 4. Sicily

Codes:
A B C D
  1. A) 1 2 3 4
  2. B) 4 3 1 2
  3. C) 3 4 2 1
  4. D) 4 3 2 1