Neco Physics 2002 Past Questions and Answers

Question 26:

• NECO 2002

A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object?

A. 2.0cm
B. 4.0 cm
C. 6.7cm
D. 20.0cm
E. 25.0cm

Question 27:

• NECO 2002

In an operating X-ray tube, a high p.d is applied between the cathode and the anode for the purpose of ____________

A. Accelerating the electrons to a very high energy
B. Concentrating electrons on the target
C. Heating the anode
D. Heating the cathode
E. Producing a stream of electrons

Question 28:

• NECO 2002

The ability of the eye to focus on objects at various distances is known as ____________

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

Question 29:

• NECO 2002

Which colour is deviated least when white light passes through a triangular prism?

A. Green
B. Indigo
C. Orange
D. Violet
E. Yellow

Question 30:

• NECO 2002

An electric heater takes 4A when operated on a 250V supply. What is the cost of the electricity consumed at 10k per kWh when the heater is used for 5 hours?

A. 10k
B. 50k
C. N1.00
D. N5.00
E. N10.00