Question 96:

• JAMB 1979

The diagram shows lens arrangement in

A. A Compound Microscope
B. Astronomical telescope
C. Binocular
D. Periscope
E. Projection lantern

Question 97:

• JAMB 1979

In a given circuit, the cell P has an emf 1.5V and an unknown internal resistance while cell Q has an emf 2.0V and an internal resistance of 1 ohm if the ammeter reads 50m A, Then r is equal to

A. 0.5 ohm
B. 0.62 ohm
C. 1.0 ohm
D. 2.0 ohm
E. 3.0 ohm

Question 98:

• JAMB 1979

An air column 10cm in length is trapped into the sea end of a capillary tube by a 15cm column of mercury with the tube held vertically as shown above. On inverting the tube the air column becomes 15cm long. The atmospheric pressure during the experiment is

A. 90cm
B. 76cm
C. 75cm
D. 60cm
E. 50cm

Question 99:

• JAMB 1979

In a resonance tube experiment, which is illustrated above, the velocity of sound in air is 327.68m/s, the frequency of the turning fork used is therefore

A. 128HZ
B. 256HZ
C. 512HZ
D. 768HZ
E. 1024HZ

Question 100:

• JAMB 1979

A uniform bean HK of length 10m and weighing 200N is supported at both ends as shown above. A man weighing 1000N stands at a point P on the beam. If the reactions at point H an K respectively are 800N and 400N, Then the distance HP is

A. 4m
B. 3.5m
C. 3m
D. \( 6 \frac{2}{3} \)m
E. 7m