General Science - Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, NDA, CDS and all one day examinations of India. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App

41. Which of the following is true about the focal length of a spherical mirror?

[A] it is equal to its radius of curvature
[B] it is equal to half its radius of curvature
[C] it is equal to twice its radius of curvature
[D] None of the above

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42. Which of the following eye-defects is also known as far -sightedness?

[A] Myopia
[B] Hyper-metropia
[C] Cataract
[D] None

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43. In which of the following cases a concave mirror will form a virtual and erect image?

[A] when object is placed at infinity
[B] when object is at focus
[C] when object is between pole and focus
[D] None of the above

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44. What is the property of a conductor to resist the flow of charges known as?

[A] Conductance
[B] Conductivity
[C] Resistance
[D] Electric Potential

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45. What is the equivalent internal resistance of a series combination of n cells?

[A] the arithmetic mean of their internal resistance
[B] the product of their individual internal resistance
[C] the sum of their individual internal resistance
[D] the sum of the reciprocal of their individual internal resistance

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46. Which of the following phenomenon is the basis of an electric generator?

[A] Electromagnetic Induction
[B] Ferroelectric effect
[C] Telluric currents
[D] Electroluminescence

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47. What is the susceptibility of a diamagnetic material?

[A] positive and small
[B] positive and large
[C] negative
[D] None

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48. What is the minimum number of logic gates in a VLSI?

[A] 10
[B] 100
[C] 1000
[D] 10000

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49. What is the output of an OR gate when both the inputs are 1?

[A] 0
[B] 1
[C] Either 0 or 1
[D] None

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50. What do we call an undoped semiconductor?

[A] Intrinsic semiconductor
[B] Extrinsic semiconductor
[C] p-type semiconductor
[D] None of the above

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