Neco Physics Past Questions and Answers

Question 16:

• NECO 2000

The smallest unit on the sleeve of a micrometer screw gauge is 0.5mm. There are fifty divisions on the thimble of the screw gauge.
What is the smallest length that can be measured with this instrument?

A. 0.05cm
B. 0.01cm
C. 0.005cm
D. 0.001cm
E. 0.0001cm

Question 17:

• NECO 2000

The length of a side of a metallic cube at 20° C is 5.0cm. Given that the linear expansively of the metal is 4.0 × 10^-5K^-1, find the volume of the cube at 120° C ____________

A. 124.50cm³
B. 125.00cm³
C. 126.00cm³
D. 126.25cm³
E. 126.50cm³

Question 18:

• NECO 2000

A boy moving with a velocity of 3 ms^-1 is brought to rest by a constant force after travelling 15m. Calculate the retardation.

A. 0.15ms^-2
B. 0.30ms^-2
C. 0.60ms^-2
D. 3.33ms^-2
E. 6.66ms^-2

Question 19:

• NECO 2000

A block of a substance X will sink in a liquid V but float liquid Z. Which of the following statements is NOT correct about the densities of the three substances?

A. Density of liquid Z is greater than that of X
B. Density of liquid V is less than that of liquid X
C. Density of liquid Y is less than that of liquid Z
D. Liquid Z has the greatest density of all the three substances.
E. If liquids Y and Z do not mix, liquid Z will float on liquid Y.

Question 20:

• NECO 2000

I. A scalar quantity has only magnitude
II. A scalar quantity has both magnitude and direction
III. A vector quantity has both magnitude and direction
IV. A vector quantity has only magnitude.

Which of the above statement is/are correct?

A. I only
B. L and II only
C. L and III only
D. II and III only
E. II and III only