Jamb Physics 1986 Past Questions and Answers

Question 41:

• JAMB 1986

if the fig above E is an accumulator with negligible internal resistance. and the EMF 9.0V, The the total current is

A. 0.3A
B. 0.8A
C. 1.0A
D. 1.8A

Question 42:

• JAMB 1986

In fig 6, a ray of light in air strikes a glass plate at an angle of incidence 60 degrees, the reflected ray is observed to be perpendicular to the refracted ray, what is the refractive index of the glass

A. 1.73
B. 1.50
C. 0.87
D. 0.57

Question 43:

• JAMB 1986

In an experiment in which molten naphthalene is allowed to cool, the cooling curve in fig 5 was obtained, the temperature \( 80^{\circ}C \) is known as

A. Cooling temperature
B. Boiling point
C. Melting point
D. Vaporization point

Question 44:

• JAMB 1986

fig 4 represents a block-and-tackle pulley system on which an effort of W newtons supports a load of 120.0N if the efficiency of the system is 40% then the value of W is

A. 28.0N
B. 48.0N
C. 50.0N
D. 288.0N

Question 45:

• JAMB 1986

In fig 3, three forces F1, F2, and F3 acting at O are in equilibrium. If the magnitude of F1 is 10N,and the magnitude of F2 is 5N, find the magnitude of F3

A. 26.4N
B. 15.0N
C. 13.2N
D. 10.0N