Physics Past Questions

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3061

The fig above shows two waveforms X and Y. If the frequency of X is 30Hz what is the frequency of Y

A. 12Hz
B. 19Hz
C. 60Hz
D. 75Hz

View Answer & Discuss (28) JAMB 1988

3062

In the figure above, what is the angle of reflection of the ray of light at mirror M\(_2\)?

A. \( 90^{\circ} \)
B. \( 60^{\circ} \)
C. \( 45^{\circ} \)
D. \( 30^{\circ} \)

View Answer & Discuss (12) JAMB 1988

3063

E,F and G are yellow, red and cyan transparent light filters respectively. The color of a white opaque object when viewed through the arrangement of the filters above is

A. yellow
B. red
C. black
D. blue

View Answer & Discuss (6) JAMB 1988

3064

The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same direction as that of the horizontal component of earth's magnetic field