Physics WAEC Past Questions

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296

The period of a wave is 0.02 second. Calculate its wavelength if its speed is 330 ms^-1

A. 6.6m
B. 5.0m
C. 4.0m
D. 3.3m
E. 2.0m

View Answer & Discuss (3) WAEC 1995

297

An alternating voltage with a frequency of 50Hz has a period of

A. 0.02s
B. 0.05s
C. 0.20s
D. 0.50 s
E. 50.00s

View Answer & Discuss (3) WAEC 1995

298

A listener can detect the instrument from which a note is being sounded because different instruments produce the same note with a different.

A. frequencies
B. pitches
C. loudness
D. intensities
E. overtones

View Answer & Discuss WAEC 1995

299

What is the escape velocity of a body on the surface of the earth of radius R if the gravitational constant is G and the mass of the earth is M? (Neglect energy losses to the surroundings)

A. 2GR
B. 2G/R
C. 2GR²
D. \(\sqrt{\frac{2GM}{R}}\)

View Answer & Discuss (6) WAEC 1995

300

A charge of 1.6 x 10^-10C is placed in a uniform electric field of intensity 2.0 x 10⁵NC^-1. What is the magnitude of the electric force exerted on the charge?

A. 3.2 x10⁵N
B. 1.8 x10⁵N
C. 3.2 x10^-5N
D. 1.8 x10^-5N
E. 4.0X10^-6N

View Answer & Discuss (1) WAEC 1995

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