Obafemi Awolowo University Physics Post Utme Past Questions and Answers

Question 11 :

In the diagram above, \(P, Q\) and \(R\) are vectors. Which of the options gives the correct relationship between the vectors?

A. \(P=R-Q \)
B. \(P=R+Q \)
C. \(P-Q-R\)
D. \(P+\) \(R+Q=0\)

Question 12 :

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. \(20 cm\)

Question 13 :

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. \(8.71 cm\)

Question 14 :

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

Question 15 :

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