Waec Physics 2019 Past Questions and Answers

Question 31:

• WAEC 2019

The diagram above represents an experimental set-up for verifying

A. Lens formula
B. Refraction laws
C. Reflection laws
D. Mirror formula

Question 32:

• WAEC 2019

Which of the following statements about a moving object is correct?

A. When accelerating, the resultant force acting on it must be equal to zero.
B. There must always be a non-zero resultant force acting on it.
C. At a steady velocity, the resultant force acting on it must be equal to zero
D. At a steady velocity, the air resistance must be equal to zero.

Question 33:

• WAEC 2019

If the efficiency of a transformer is 100%, which of the following equations would be correct?

A. N\(_p\)E\(_p\) = N\(_s\)E\(_s\)
B. N\(_s\)I\(_p\)= N\(_p\)I\(_s\)
C. N\(_s\)I\(_s\) = N\(_p\)I\(_p\)
D. I\(_p\)E\(_s\) = I\(_s\)E\(_p\)

Question 34:

• WAEC 2019

A freshly demagnetized bar magnet is placed in the East-West direction to ensure that

A. The molecular magnets remain randomly arranged.
B. The molecular magnets are properly aligned
C. It is affected by the earth's magnetic field
D. The magnetic domains are within the earth's field

Question 35:

• WAEC 2019

Which of the following graphs of a charge Q against potential difference V across the capacitor is correct?

A. A
B. B
C. C
D. D