Waec Physics 2013 Past Questions and Answers

Question 26:

• WAEC 2013

A diverging lens of focal length 30cm produces an image 20cm from the lens. Determine the object distance

A. 10cm
B. 12cm
C. 50cm
D. 60cm

Question 27:

• WAEC 2013

Which of the following statements about the Galilean telescope is not correct?

A. The final image is inverted
B. It is shorter than terrestial telescope
C. The final image is erect
D. It has a small field of view

Question 28:

• WAEC 2013

Which of the following radiations has it's frequency lower than that of infrared radiation?

A. Utra-violet rays
B. Gamma rays
C. X-rays
D. Radio waves

Question 29:

• WAEC 2013

A string under tension produces a note of frequency 14Hz. Determine the frequency when the tension is quadrupled.

A. 14Hz
B. 18Hz
C. 28Hz
D. 56Hz

Question 30:

• WAEC 2013

Which of the following statements about waves in pipes is correct?

A. For open pipes, there is only one end correction to be accounted for
B. For closed pipes, there are two end corrections to be accounted for
C. Only odd harmonics are possible in closed pipes
D. All harmonics are possible in closed pipes