Physics WAEC Past Questions

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866

Find the cost of running a 60W lamp for 24 hours. If 1kW hr cost 5 naira

A. 14.4 naira
B. 12.5 naira
C. 7.2 naira
D. 2.0 naira

View Answer & Discuss WAEC 2004

867

The quantity of electric charge stored in a capacitor is measured in

A. farad
B. ampere
C. coulomb
D. volt

View Answer & Discuss (7) WAEC 2004

868

Calculate the energy stored in a 20\(\mu F\) capacitor. If the p.d between the plates is 40V

A. 3.2 x 10^-2J
B. 1.6 x 10^-2J
C. 8.0 x 10^-4J
D. 4.0 x 10^-4J

View Answer & Discuss (3) WAEC 2004

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869

Given that the gravitational constant is G. Newton's universal law of gravitation states that the force of attraction between two masses M₁ and M₂ separation by a distance r is

A. \(Gr^2 M_1M_2\)
B. \(Gr M_1M_2\)
C. \(\frac{GM_1 M_2}{r^2}\)
D. \(\frac{GM_1 M_2}{r}\)

View Answer & Discuss (2) WAEC 2004

870

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

A. 3.2 x 10⁵N
B. 1.8 x 10⁵N
C. 3.2 x 10^-5N
D. 1.8 x 10^-5N

View Answer & Discuss WAEC 2004

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