Previous year MCQs

General science UPPSC 1998 GS-I
Question

With which of the following is the tape of the tape recorder coated?

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Ferromagnetic powder

Detailed Solution:

The correct answer is “Ferromagnetic powder”.
This ferromagnetic powder, typically iron oxide, is essential for recording audio. When the tape passes over the recording head, the magnetic field aligns the particles on the tape, creating a magnetic pattern that represents the sound.

Similar Questions:

The book 'A Brief History of Time' has been written by whom?
  1. A) Stephen Hawking
  2. B) J.V. Narlikar
  3. C) C.V. Raman
  4. D) S. Bose
Which of the following have been recognised as Fundamental Rights by the Supreme Court of India?

1. Right to shelter
2. Right to travel abroad
3. Right to equal pay for qual work

Select the correct answer from the codes given below:
Codes:
  1. A) 1 and 2
  2. B) 2 and 3
  3. C) 1 and 3
  4. D) 1, 2 and 3
Accumulation of which one of the following in the muscles leads to fatigue?
  1. A) Lactic acid
  2. B) Benzoic acid
  3. C) Pyruvic acid
  4. D) Uric acid
Which one of the following atmospheric change takes place due to the greenhouse effect?
  1. A) Increase in carbon dioxide concentration in the atmosphere
  2. B) Increase in humidity in the atmosphere
  3. C) Increase in biological population
  4. D) Increase in wind speed
When doctor tells a person that he/she has been affected with tetraplegia, it means that he/she is suffering from paralysis of:
  1. A) right hand only
  2. B) left hand only
  3. C) his both legs only
  4. D) both hands and both legs
The most important factor contributing to the loss of vulture population in India is:
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  2. B) Bacterial infection
  3. C) Administering of pain killers to cattle
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Which of the following was invented by Wilhelm Roentgen?
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  2. B) X-Ray Machine
  3. C) Electric Bulb
  4. D) None of the above
Which of the following is NOT correctly matched ?
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  2. B) Compound present in bones - Calcium phosphate
  3. C) Souring of milk - Nitric acid
  4. D) Acid present in gastric juice - Hydrochloric acid
Which one of the following is not an explosive?
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  2. B) Trinitroglycerine
  3. C) Cyclotrimethylene Trinitramine
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Match list I with list II and select the correct answer from the code given below:
List-I (Acid) - List-II (Source)

A. Lactic acid - 1. Lemon
B. Acetic acid - 2. Rancid butter
C. Citric acid - 3. Milk
D. Butyric acid - 4. Vinegar

Code:
A B C D
  1. A) 1 4 3 4
  2. B) 3 4 1 2
  3. C) 2 3 4 2
  4. D) 3 2 3 1
Which one of the following is not correctly matched:
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  2. B) Isohyet - Rainfall
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What type of electromagnetic radiation is used in the remote control of a television?
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  2. B) Ultraviolet
  3. C) Visible
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