Q1. Which of the following statements is not correct for economically underdeveloped countries ? (a) Involvement of a very little proportion of labour in primary occupations (b) Lower percentage of literacy (c) Mass unemployment (d) High birth rate Answer: (a) Involvement of a very little proportion of labour in primary occupations Explanation: In economically underdeveloped …
In 1924, a young French physicist named Louis de Broglie proposed one of the most revolutionary ideas in modern physics: if light could behave as both a wave and a particle, why couldn’t matter do the same? The Central Idea He proposed that every particle with momentum possesses a wavelength, now called the de …
Q1. Two capacitors C and 2C charged to V and 2V respectively are connected in parallel with opposite polarity. The common potential is: (A) V (B) V/2 (C) V/3 (D) 3V Ans: (A) V Solution: Given: Capacitor 1: Capacitance = \( C \), Potential = \( V \) Capacitor 2: Capacitance = \( 2C \), …
Q1. Indianisation of the Civil Services was done by (a) Lord Ripon (b) Lord Mayo (c) Lord Lytton (d) Lord Reading (UPSC Prelims 1987) Answer: (c) Lord Lytton Explanation: Lord Lytton initiated steps toward Indianisation of the Civil Services, allowing Indians to compete in the exams for administrative posts. This was a significant shift from …
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Q1. Which of the following is/are found in plant cells but not in those of animals? (a) Plastid & Cellular wall (b) Chromosome (c) Mitochondria & Golgi apparatus (d) Cell wall & lysozyme (UPSC Prelims 1987) Answer: (a) Plastid & Cellular wall Explanation: Plant cells possess plastids (like chloroplasts) and a cell wall, which are …
Q1. India’s contribution to Mathematics includes Number system Decimal system Concept of zero (a) 1, 2 & 3 (b) 1 & 2 (c) 2 & 3 (d) 1 & 3 (UPSC Prelims 1987) Answer: (c) 2 & 3 Explanation: India made pioneering contributions to the Decimal system and the Concept of zero, both of which …
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Motor Current Signature Analysis (MCSA) is a diagnostic techniques for detecting faults in electric motors and their driven equipment. By analyzing the current drawn by a motor during operation, we can identify developing problems before they lead to actual failures, enabling the transition from reactive to predictive maintenance strategies. Unlike traditional vibration analysis or thermal …
Q1. The first political association in the Bombay Presidency was established by (a) Gopal Krishna Gokhale in 1905 (b) S. N. Bannerjee in 1894 (c) Dadabhai Naoroji in 1852 (d) Annie Besant in 1924 (UPSC Prelims 1986) Answer: (c) Dadabhai Naoroji in 1852 Explanation: The earliest political association in the Bombay Presidency was the Bombay …
Q1. Arrange the following in a chronological order (i) Surat Split (ii) Formation of Muslim League (iii) Partition of Bengal (iv) Regulating Act (a) (i), (ii), (iii), (iv) (b) (iv), (iii), (ii), (i) (c) (ii), (i), (iv), (iii) (d) (ii), (iii), (iv), (i) (UPSC Prelims 1986) Answer: (b) (iv), (iii), (ii), (i) Explanation: Chronological order: …
Q1. Which of the following statements is incorrect ? (a) Entropy is a quantity introduced to give clear expression to the results of thermodynamics (b) Change in entropy is defined as the ratio of the amount of heat taken up to the absolute temperature (c) Change in entropy is directly proportional to the amount of …