Physics Past Questions

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2316

An object is placed on the principal axis and at the centre of curvature of a concave mirror, the image of the image formed by the mirror is

A. real and magnified
B. real and inverted
C. erect and magnified
D. erect and virtual

View Answer & Discuss WAEC 2003

2317

A converging lens produces an image four times as large as an object placed 25cm from the lens. Calculate its focal length

A. 100cm
B. 33cm
C. 29cm
D. 20cm

View Answer & Discuss (7) WAEC 2003

2318

The horizontal floor of a water reservoir appears to be 1.0m deep when viewed vertically from above. If the refractive index of water is 1.35, calculate the real depth of the reservoir

A. 2.35m
B. 1.35m
C. 1.00m
D. 0.35m

View Answer & Discuss WAEC 2003

2319

A converging lens has a focal length of 5cm. Determine its power

A. +20.0
B. +0.2
C. -20.00
D. -0.2

View Answer & Discuss (6) WAEC 2003

2320

Which of the following pairs of rays shows the widest separation in the spectrum of white light?

A. green and blue
B. orange and indigo
C. blue and violet
D. red and yellow

View Answer & Discuss WAEC 2003

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