CBSE Class 9 English · Ch 4: A Truly Beautiful Mind

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Difficulty: 7 medium · 23 hard

A Truly Beautiful Mind MCQ questions with answers

The first 3 of 30 questions. Unlock the series for the rest, each with a solution.

1. Q1. Which statement about Einstein's later choices, as described in the chapter, is correct?

   • A. He personally helped Germany build the atomic bomb before leaving for the United States
   • B. He urged Roosevelt to build the atomic bomb and later felt proud of helping end the war
   • C. He refused to have any connection with atomic energy throughout his life
   • D. He wrote to Roosevelt about the possibility of atomic weapons, a step he deeply regretted later
   Solution

   Einstein warned Roosevelt about the possibility of atomic weapons being developed, but he later deeply regretted this once he saw their destructive power.

2. Q2. Einstein's theories did not make him instantly famous in 1905. According to the chapter, what event finally brought him worldwide recognition in 1919?

   • A. His receiving the Nobel Prize in Physics
   • B. His appointment as a professor at Princeton University
   • C. The publication of his letter to President Roosevelt
   • D. The confirmation, during a solar eclipse expedition, that gravity bends light as his theory predicted
   Solution

   In 1919, an eclipse expedition confirmed Einstein's prediction that light bends under gravity, which made him instantly famous across the world.

3. Q3. In 1905, Einstein published four papers that transformed physics. For which of these contributions was he awarded the Nobel Prize in 1921?

   • A. The special theory of relativity
   • B. The equivalence of mass and energy
   • C. His explanation of the photoelectric effect
   • D. His study of Brownian motion
   Solution

   Although Einstein is best remembered for relativity, he actually received the Nobel Prize for his explanation of the photoelectric effect.

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