NECO Physics Past Questions & Answers - Page 30

147.

A plane which is Inclined at an angle of 30 ° to the horizontal has a velocity ratio of

A.

2

B.

1

C.

0.87

D.

0.67

E.

0.5

Correct answer is A

No explanation has been provided for this answer.

148.

The component of a vector in a given direction is

A.

equal to the magnitude of the resultant vector in that direction

B.

equal to the magnitude of the resultant vector in the opposite direction

C.

its effective magnitude

D.

its effective value in that direction

E.

its effective value in the opposite direction

Correct answer is D

No explanation has been provided for this answer.

149.

In which of these fields are repulsive forces NOT experienced?

I. Magnetic field
II. Gravitational field
III. Electric field

A.

I only

B.

II only

C.

III only

D.

I and III only

E.

II and III only

Correct answer is B

No explanation has been provided for this answer.

150.

A force F is applied to a body P as shown in the diagram above. If the body moves through a distance, a, which of the following represents the work done?

A.

Fa

B.

Fa Cos θ

C.

\(\frac{Fa}{\cos \theta}\)

D.

FaSin θ

E.

\(\frac{Fa}{\sin \theta}\)

Correct answer is B

No explanation has been provided for this answer.