Physics 2001 Neco Past Questions and Answers

Question 36 :

• NECO 2001

The speed of sound travelling in various media increases in the order:

A. Air, iron bar, water
B. Air, water, iron bar
C. Iron, bar water, air
D. Water, air, iron bar
E. Water, iron bar, air

Question 37 :

• NECO 2001

The lower and upper fixed points of a mercury-in-glass thermometer are marked X and 180 mm respectively. On a particular day the mercury meniscus in the thermometer rises to 60mm. If the corresponding reading on a Celsius scale is 20 ° C, what is the value X?

A. 6.0mm
B. 18.0mm
C. 30.0mm
D. 60.0mm
E. 120.0mm

Question 38 :

• NECO 2001

When water is heated between 0°C and 4°C, it's density

A. Increases for a while and then decreases
B. Decreases for a while and then increases
C. Increases
D. Decreases
E. Remains constant.

Question 39 :

• NECO 2001

If N.E.P.A. charges 65 kobo per kilowatt-hour for electricity supplied to consumers, what bill would an electric iron rated at 750 watts attract when used for 24 hours?

A. N9.70
B. N11.70
C. N12.40
D. N15.90
E. N17.60

Question 40 :

• NECO 2001

An object is placed 15cm in front of a concave mirror of focal length 20cm. The image formed is ____________

A. Real, inverted and diminished
B. Real, inverted and magnified
C. Virtual, erect and diminished
D. Virtual, erect and magnified
E. Virtual, inverted and magnified