Post Utme Obafemi Awolowo University Physics 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 $10.0cm$ is used to form a real image which is half the size of the object. How far from the object is the image?

A. $45cm$
B. $30cm$
C. $15\text{(}cm$
D. $20cm$

Question 13:

A diverging lens of focal length $20cm$ forms an image, half of the size of the object. What is the object distance?

A. $11.11cm$
B. $100cm$
C. $60cm$
D. $8.71cm$

Question 14:

An object of height $3.00cm$ is placed $10cm$ in front of a biconvex lens of focal length $15cm$, the image of the object is ____________

A. Real and $3.00cm$ tall
B. Virtual and $3.00cm$ tall
C. Virtual and $9.00cm$ tall
D. Real and $9.00cm$ 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