Waec Physics 2003 Past Questions and Answers

Question 26:

• WAEC 2003

The speed of sound in air is is directly proportional to

A. Its temperature on the celsius scale
B. Ite temperature in the thermodynamic scale
C. The cube root of its temperature on its celcius csale
D. The square roor of its temperature on the absolute scale

Question 27:

• WAEC 2003

A sonometer wire of linear density 0.08kg m^-1 subjected to a tension of 800N is plucked. Calculate the speed of a pulse which moves from one end of the wire to the other

A. 179.0ms^-1
B. 100.0ms^-1
C. 15.8ms^-1
D. 8.0ms^-1

Question 28:

• WAEC 2003

Which of the following instruments gives a pure note when sounded?

A. Talking drum
B. Siren
C. Tunning fork
D. Guitar

Question 29:

• WAEC 2003

Which of the following features of an electrostatic line of force is not correct?

A. It is an imaginary line which a positive charge will describe if it is free to move
B. The tangent drawn at any point on a curved line of force shows the direction of the electric field intensity at that point
C. It is sometimes curved
D. It can cross another line of force in a region of intense electric field

Question 30:

• WAEC 2003

Which of the following statement about force is correct ?

A. Electrostatic, gravitational and magnetic forces are always attractive
B. Electric, gravitational and magnetic field obeys inverse square law
C. Field lines are real but their corresponding field are imaginary
D. Field lines and their corresponding fields are both real