NECO Physics Past Questions & Answers - Page 28

136.

An electron makes a transition from - 1.60 eV energy level to - 10.4eV energy level Calculate the energy loss due to the transition.

A.

16.64eV

B.

12.00eV

C.

10.40eV

D.

8.80eV

E.

6.50eV

Correct answer is D

No explanation has been provided for this answer.

137.

When very hot water is poured into a thin-walled glass container, it is less likely to break because

A.

all parts of the container got heated-uniformly

B.

glass can withstand a very high temperature

C.

the molecules of glass are too far apart to cause breakages of the container

D.

the outer part of the container is cooler than the inner part

E.

thin glass does not expand fast

Correct answer is A

No explanation has been provided for this answer.

138.

The frequency of a body executing simple harmonic motion when left undisturbed is known as__________ frequency.

A.

damped

B.

forced

C.

free

D.

natural

E.

sinusoidal

Correct answer is D

No explanation has been provided for this answer.

139.

Which of the following statements is true of nuclear fission?

A.

Heavy nuclei combine to form new element

B.

Protons are used in bombarding heavy nucleus

C.

The sum of the masses of the products is greater than the mass of the original substance

D.

Two light nuclei are made to combine to form a heavy nucleus

E.

Very large amount of energy is released.

Correct answer is E

No explanation has been provided for this answer.

140.

The temperature at which the water vapour present in the air is just enough to saturate the air is the _______ point.

A.

boiling

B.

critical

C.

dew

D.

ice

E.

steam

Correct answer is C

No explanation has been provided for this answer.