Post Utme Physics Past Questions and Answers

Question 1206:

Which of the followings are the correct S.I. units of the quantities indicated? I. Thrust (N) II. Impulse \(\left( Kg m s ^{-1}\right)\) III. Energy density (J) IV. Electromotive force \(ML ^{2} T ^{-3}\).

A. I and III only
B. II and III only
C. I, II and IV only
D. I, III and IV

Question 1207:

Two balls of masses \(60 g\) and \(40 g\) respectively, are attached firmly to the ends of a light metre rule. The centre of gravity of the system is

A. \(60 cm\) from the heavier mass
B. At the mid-point of the metre rule
C. \(40 cm\) from the lighter mass
D. \(40 cm\) from the heavier mass

Question 1208:

The half-life of a radioactive element is 9 days. Calculate the fraction that decayed after 36 days.

A. 1/16
B. 1/32
C. \(1 / 8\)
D. \(15 / 16\)

Question 1209:

The function of the ammonium chloride solution in a leclanche cell is to

A. Decrease the e.m. \(f\) of the cell
B. Prevent local action in the cell
C. Prevent polarization of the cell
D. Act as the electrolyte of the cell

Question 1210:

The tension of a sonometer wire may be quadrupled by

A. Doubling the lengih of the wire
B. Doubling the mass of the wire
C. Increasing the fundamental frequency of vibration by 2
D. Reducing the ahsolute lemperature by half