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Physics Past Questions and Answers

Post Utme Physics Questions

Question 256:
A convex lens of focal length \(10.0 cm\) is used to form a real image which is half the size of the object. How far from the object is the image?
  • A \(45 cm\)
  • B \(30 cm\)
  • C \(15 \(cm\)
  • D \(20 cm\)
View Answer & Explanation
Question 257:
A diverging lens of focal length \(20 cm\) forms an image, half of the size of the object. What is the object distance?
  • A \(11.11 cm\)
  • B \(100 cm\)
  • C \(60 cm\)
  • D \(8.71 cm\)
View Answer & Explanation
Question 258:
An object of height \(3.00 cm\) is placed \(10 cm\) in front of a biconvex lens of focal length \(15 cm\), the image of the object is ____________
  • A Real and \(3.00 cm\) tall
  • B Virtual and \(3.00 cm\) tall
  • C Virtual and \(9.00 cm\) tall
  • D Real and \(9.00 cm\) tall
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Question 259:
The most suitable type of mirror used for the construction of a search light is the ____________
  • A Concave mirror
  • B Convex mirror
  • C Spherical mirror
  • D Parabolic mirror
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Question 260:
Light waves and ripples of water are similar because both ____________
  • A Are longitudinal waves
  • B Have the same velocity
  • C Can be diffracted and refracted
  • D Have the same frequency
View Answer & Explanation