NECO Physics Past Questions & Answers - Page 41

201.

Young’s modulus of elasticity is the ratio of stress to strain, provided the load does not exceed the

A.

breaking point

B.

elastic limit

C.

plastic limit

D.

stress limit

E.

yield point

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

202.

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

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

203.

Which of the following is/are TRUE of nuclear fission?

I. A heavy nucleus is split into two nuclei of comparable masses.
II. Two light nuclei are joined together to form a heavier nucleus.
III. The total mass of the products is less than that of the reactants.

A.

I only

B.

II only

C.

III only

D.

I and III only

E.

II and III only

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

204.

A transformer supplies 12V when connected to a 240V mains. If the transformer takes 0.120A from the mains when used to light a 12V, 24W lamp, what is its efficiency?

A.

57.20%

B.

66.60%

C.

83.30%

D.

92.50%

E.

100%

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

205.

Which of the following is a percussion instrument?

A.

bell

B.

flute

C.

guitar

D.

piano

E.

organ

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.


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