Previous year MCQs

General science UPPSC 2006 GS-I
Question

The device used for converting alternating current to direct current is called

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Rectifier

Detailed Solution:

The correct answer is “Rectifier”.
A rectifier is an electrical device that converts AC to DC by allowing current to flow in one direction only. This process is achieved using diodes or other semiconductor devices.

Similar Questions:

Which of the following is not included in the Directive Principles of State Policy?
  1. A) Prohibition of liquor
  2. B) Right to work
  3. C) Equal wage for equal work
  4. D) Right to information
Of the two bulbs in a house, one glows brighter than the other. Which of the following statements is correct?
  1. A) The brightness does not depend on resistance
  2. B) Both the bulbs have the same resistance
  3. C) The brighter bulb has larger resistance
  4. D) The dimmer bulb has larger resistance.
Consider the following statements:

1) According to a survey conducted by Uttar Pradesh Planning Department recently. Lucknow has been found to be the most development.
2) As per recent study conducted in 20 states by the "Centre for Media Studies", corruption in 2005 in India is less than what it was in 2002.
3) As per targets set for Bharat Nirman Yojna, houses to be constructed for the rural poor would not even meet 50% of the shortage of rural houses.

Select the correct answer from the code given below:
Code:
  1. A) l and 2 only
  2. B) 2 and 3 only
  3. C) 1 and 3 only
  4. D) all the three
A hydrophyte is:
  1. A) a marine animal
  2. B) an aquatic plant
  3. C) a plant disease
  4. D) a rootless plant
Acid rain is caused by:
  1. A) cooling of acid vapours reaching the clouds
  2. B) reaction between rain water and carbon dioxide pollutants
  3. C) reaction between cloud water and sulphur dioxide pollutants
  4. D) reaction between water vapours and electric charge during lightning and cloud hursts
Who formulates the monetary policy in India?
  1. A) SEBI
  2. B) RBI
  3. C) Finance Ministry
  4. D) Planning Commission
The planet nearest to the earth is:
  1. A) Mercury
  2. B) Venus
  3. C) Mars
  4. D) Jupiter
Which of the following pars is NOT correctly matched?
  1. A) Oxytocin - Hormone
  2. B) Aspartame - Synthetic sweetener
  3. C) Neoprene - Specialized rubber
  4. D) Rayon - Modified starch
Given below are two statements, one labelled as Assertion (A) and the other as Reason (R).

Assertion (A): Most of the vitamins are not synthesised in human body.
Reason (R): Human organ synthesise only essential micronutrients.

Select the correct answer form the code given below.
  1. A) Both (A) & (R) are true & (R) is correct explanation of (A)
  2. B) Both (A) & (R) are true, but (R) is not correct explanation of (A)
  3. C) (A) is true, but (R) is false.
  4. D) A) is false, but (R) is true.
The velocity of wind is measured by
  1. A) Barometer
  2. B) Anemometer
  3. C) Hydrometer
  4. D) Wind Vane
Wireless communication is reflected to earth’s surface by
  1. A) Troposphere
  2. B) Stratosphere
  3. C) Ionosphere
  4. D) Exosphere
President A.P.J. Abdul Kalam visited so many countries; one of them happens to be a count visited by any President of India for the first it. Which one of these is that country?
  1. A) Mauritius
  2. B) South Africa
  3. C) Myanmar
  4. D) None of these