NECO Past Questions and Answers - Page 183

911.

Range is NOT the best method of measuring dispersion because it considers only the

A.

First number

B.

First two numbers

C.

Frequently occurred number

D.

Middle number

E.

Two extreme number

Correct answer is E

No explanation has been provided for this answer.

912.

Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V.

A.

0.02 J

B.

0.10 J

C.

0.20 J

D.

1.00 J

E.

10.00 J

Correct answer is E

No explanation has been provided for this answer.

913.

The phenomenon of photoelectric effect is used in the following EXCEPT

A.

automatic doors

B.

bugler alarm

C.

electric fire alarm

D.

sound production from film tracks

E.

television cameras

Correct answer is D

No explanation has been provided for this answer.

914.

Which of the following will NOT bring about an increase in Labour force?

A.

Better medical services

B.

Decrease in death rate

C.

Emigration

D.

Immigration

E.

Increase in birth rate

Correct answer is C

No explanation has been provided for this answer.

915.

An effort P applied at one end of a crowbar just overcomes the resistance W at the lid of a tin. The mechanical advantage of the crowbar is expressed as

A.

W + P

B.

P - W

C.

\(\frac{w}{p}\)

D.

\(\frac{p}{w}\)

E.

wp

Correct answer is C

No explanation has been provided for this answer.