General Knowledge - Physics

Exercise :: Physics - Section 1

  • Physics - Section 1
67. 

Identify the vector quantity from the following

A. Heat
B. Angular momentum
C. Time
D. Work

Answer: Option B

Explanation:

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68. 

Large astronomical telescopes always use as objective

A. lens
B. mirror
C. combinations of lenses
D. None of the above

Answer: Option C

Explanation:

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69. 

One should not connect a number of electrical appliances to the same power socket because

A. this can damage the appliances due to overloading
B. this can damage the domestic wiring due to overloading
C. this can damage the electrical meter
D. the appliance will not get full voltage

Answer: Option B

Explanation:

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70. 

Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?

  1. Diffusion
  2. Refraction
  3. Internal reflection

A. I, II and III
B. I and II
C. II and III
D. I and III

Answer: Option C

Explanation:

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71. 

Natural radioactivity was discovered by

A. Marie Curie
B. Ernest Rutherfor
C. Henri Becquerel
D. Enrico Fermi

Answer: Option C

Explanation:

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72. 

Planets are

A. luminous heavenly bodies revolving around a star
B. non-luminous heavenly bodies
C. luminous heavenly bodies that twinkle
D. luminous heavenly bodies that do not twinkle

Answer: Option B

Explanation:

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