SSC UPSC general science MCQ GK Questions and Answers for all competitive exams UPSC SSC Bank Exams MCQ and Entrance exams Preparation Online free Gk Questions practice
17. Consider the following statements:
1.In our houses, the current in A.C. electricity line changes direction sixty times per second.
2.The frequency of alternating voltage applied is 60 Hz. Which of the above statements is/are true?
|Answer : Option B|
19. The gravitational force with which the sun attracts the earth
1.is less than the force with which the earth attracts the sun
2.is the same as the force with which earth attracts the sun
3.is more than the force with which the earth attracts the sun
4.varies with the distance between them Which of the above statements is/are correct?
|Answer : Option C|
29. Consider the following statements:
1.The apparent weight of a body floating in a liquid is zero.
2.The weight of the liquid displaced by the immersed part of the body equals its weight. Which of the above statements is/are true?
|Answer : Option D|