Waec Physics 1988 Past Questions and Answers

Question 46:

• WAEC 1988

When sugar at the bottom of a glass of water gradually dissolves, the water level does not change applicably. Which of the following statements best describe this?

A. Water is suitable solvent for sugar
B. The sugar and the water have become single solution
C. The volume of water molecule does not change when sugar dissolves.
D. Sugar molecule is small than that of water
E. Water molecules are separated by large spaces between them

Question 47:

• WAEC 1988

Which of the following explains the concave meniscus of water in a glass tube?

A. The adhesion between water and glas is greater than the cohesion between water molecules
B. The cohesion between water molecule is greater than the adhesion between glass and water
C. The molecules of water in the glass are moving faster than the molecules in the other parts
D. The molecules of water at the water-air boundary are often attracted to the center of the tube
E. The weight of the water pulls the central part of the surface down

Question 48:

• WAEC 1988

The unit of inductance is the

A. Farad
B. Henry
C. Hertz
D. Ampere
E. Coulomb

Question 49:

• WAEC 1988

Which of the following is/are not correct about isotopes of an element? The have

A. The same neutron number
B. The same proton number
C. Same number of electrons
D. Same chemical properties
E. Different physical poperties.

Question 50:

• WAEC 1988

Which of the following is/are not affected by a magnetic field?
I. Neutrons
II. Cathode rays
III. Alpha particles

A. I only
B. II only
C. III only
D. I & III only
E. I, II & III