NECO Physics Past Questions & Answers - Page 21

101.

A stone of mass 0.7 kg is projected vertically upward with a speed of 5 ms-1. Calculate the maximum height reached. [g =10ms-2]

A.

1.25m

B.

1.50m

C.

2.50m

D.

3.75m

E.

5.00Nm

Correct answer is A

No explanation has been provided for this answer.

102.

A projectile is projected with an initial velocity u, at an angle θ to the horizontal. The maximum height attained is.

A.

U2 sin \(\frac{\theta}{g}\)

B.

2U2 sin2 \(\frac{\theta}{g}\)

C.

U sin2 \(\frac{\theta}{g}\)

D.

U2 sin2\(\frac{\theta}{g}\)

Correct answer is D

No explanation has been provided for this answer.

103.

Which of the following is a desirable property of a fuse Wire?

A.

High expansively

B.

High thermal conductivity

C.

Low density

D.

Low electrical resistivity

E.

Low melting point

Correct answer is D

No explanation has been provided for this answer.

104.

In which of the following is the expansion of solids a disadvantage?

A.

Electric iron

B.

Fire alarm

C.

The balance wheel of a watch

D.

The bimetallic thermometer

E.

The fitting of wheels in rims

Correct answer is C

No explanation has been provided for this answer.

105.

A 12V battery supplies a current of 0.4A to a lamp. Calculate the resistance of the lamp.

A.

30.00

B.

4.80

C.

3.00

D.

0.30

E.

0.03

Correct answer is A

No explanation has been provided for this answer.