Question 786:

• JAMB 1994

An object is placed directly below a glass block of thickness 3.0cm. Calculate the lateral displacement of the object if the refractive index of the glass is 1.5.

A. 1.0cm
B. 1.5cm
C. 2.0cm
D. 2.5cm

Question 787:

• JAMB 1994

In a projection lantern of focal length f, the object distance u, is such that

A. U > 2f > f
B. U < f < 2f
C. U = f < 2f
D. F < u < 2f

Question 788:

• JAMB 1994

If the Nigeria flag (green, white, green) is viewed in pure yellow light, which of the following set of colours would be observed on the flag?

A. Green, yellow, green
B. Red, yellow, red
C. Black, yellow, black
D. Green, white, green

Question 789:

• JAMB 1994

Which of the following has the lowest internal resistance when new?

A. Leclanche cell
B. Daniel cell
C. Accumulator
D. Torch battery

Question 790:

• JAMB 1994

When a biro pen rubbed on a dry silk cloth is moved very close to a piece of paper on a dry table, the pen is found to pick up the paper. This is because

A. Both the pen and the cloth are magnetized
B. The pen is magnetized but the cloth is not
C. The pen is charged while the cloth is magnetized
D. Both the pen and the cloth are charged