Question 4461:

• NECO 2003

The inability of the eye to focus near objects is known as ____________

A. Astigmatism
B. Eye ring
C. Hypermetropia
D. Myopia
E. Presbyopia

Question 4462:

• NECO 2003

A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C.

A. 6.0Ω
B. 6.42Ω
C. 7.6Ω
D. 8.4Ω
E. 16.0Ω

Question 4463:

• NECO 2003

Calculate the critical angle for light travelling from water to air. (Refractive index of water = 1.33)

A. 36.9°
B. 41.3°
C. 48.8°
D. 49.2°
E. 51.4°

Question 4464:

• NECO 2003

A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the ____________

A. Charges generated by friction in the tanker are conducted to the earth
B. Chain vibrates in resonance with the tanker’s engine
C. Heat generated by friction in the engine is conducted to the earth
D. Petrol tanker is balanced on the road
E. Tanker does not exceed a certain speed limit

Question 4465:

• NECO 2003

A transformer is required to give 120V from a 240V mains supply. If the primary has 5500 turns, how many turns has the secondary?

A. 232
B. 450
C. 550
D. 2750
E. 11000