Question 246:

• JAMB 1983

In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f₁ and the next tuning fork to give resonance had a frequency f₂, find the ratio \(\frac{f^2}{f^2}\).

A. 8
B. 3
C. 2
D. \(\frac{1}{2}\)
E. \(\frac{1}{3}\)

Question 247:

• JAMB 1983

In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f₁ and the next tuning fork to give resonance had a frequency f₂, find the ratio \(\frac{f^2}{f^2}\).

A. 8
B. 3
C. 2
D. \(\frac{1}{2}\)
E. \(\frac{1}{3}\)

Question 248:

• JAMB 1983

Which of the following is NOT a vector quantity?

A. Force
B. Altitude
C. Weight
D. Displacement
E. Acceleration

Question 249:

• JAMB 1983

Which of the following statements about friction is NOT correct?

A. The force of kinetic friction is less than the force of static friction
B. The force of kinetic friction between two surfaces is independent of the areas in contact provided the normal reaction is unchanged
C. The force of rolling friction between two surfaces is less than the force of sliding friction
D. The angle of friction is the angle between the normal reaction and the force of friction
E. Friction may be reduced by lubriction

Question 250:

• JAMB 1983

The force with which an object is attracted to the earth is called its

A. Acceleration
B. Mass
C. Gravity
D. Impulse
E. Weight