Post Utme Physics Past Questions and Answers

Question 1106:

Which of the following is the function of a \(p - n\) junction scmiconductor device?

A. It transforms a direct voltage to \(AC\) voltage
B. It steps up an \(AC\) voltage
C. It steps down an \(AC\) voltage
D. It transforms \(AC\) voltage to direct voltage

Question 1107:

Adeoye moves a distance of \(4.0 km\) from a point, A on a bearing of \(N 30^{\circ} E\) to a point \(B\) and then a distance of \(3.0 km\) on a bearing of \(S 60^{\circ} E\) to a point, C, Calculate Adeoye's resultant displacement from point, A

A. \(10 km\), \(N 60^{\circ} E\)
B. \(5 km , N 67^{\circ} E\)
C. \(3 km , S 30^{\circ} E\)
D. \(4 km , S 60^{\circ} E\)

Question 1108:

Which of the following statements is true?

A. The unit of mass is Newton \((N)\)
B. Weight of an object is a scalar quantity
C. The weight of an object varies from one place to another
D. The dimensions of weight are \(M ^{-2} LT ^{-2}\)

Question 1109:

Which of the following is not an example of rotational motion?

A. Rotation of electric fan blades
B. Movement of car wheels
C. Rotation of the earth about its axis
D. Movement of a loaded spring about its equilibrium position

Question 1110:

An object of mass, \(5 kg\) placed on an inclined plane (which is at an angle of \(30^{\circ}\) to the horizontal) is attached to a \(10 kg\) mass through a pulley, with the \(10 kg\) hanging vertically. Calculate the acceleration of the mass-system in terms of the acceleration due to gravity, \(g\), if there is no friction between the \(5 kg\) mass and the plane.

A. \(\frac{2}{5} g\)
B. \(\frac{3 g }{5}\)
C. \(\frac{1}{2} g\)
D. \(\frac{3}{2} g\)