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WAEC Physics

Page 21

To obtain a virtual, erect and magnified image from a thin converging lens, an object must be placed

a.

between the focus and the lens

b.

at the focus

c.

between the focus and twice the focal length

d.

beyond twice the focal length

A body of mass 2kg is released from a point 100m above the ground. Calculate its kinetic energy 80m from the point of release.

a.

1600J

b.

900J

c.

600J

d.

200J

Which of the following quantities are dimensionally independent?
I. dielectric constant
II. momentum
III. efficiency
IV. refractive index

a.

I and II

b.

II, III and IV

c.

I, II, III and IV

d.

I, III and IV

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