Physics 1990 WAEC Past Questions

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A work of 30 joules is done is transferring 5 millicoulombs of charge from a point B to a point A in an electric Held. The potential difference between B and A is

A. 1.7 x 10^-4V
B. 3.4x10^-4V
C. 1.5x10^-1V
D. 6.0 x10³V
E. 1.2 x10⁴V

View Answer & Discuss (13) WAEC 1990

What is the value of R when G shows no deflection in the circuit illustrated above?

A. 80Ω
B. 75Ω
C. 45Ω
D. 20Ω
E. 10Ω

View Answer & Discuss (4) WAEC 1990

A charge of 1.0 x 10^-5 Coulombs experience force of 40N at a certain point in space. What is the electric field intensity?

A. 8.00 x 10⁶NC^-1
B. 4.00 x 10⁶NC^-1
C. 4.00 x 10^-4NC^-1
D. 2.00 x 10^-4NC^-1
E. 2.50 x 10^-1NC^-1

View Answer & Discuss (1) WAEC 1990

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If the frequency of the ac. circuit illustrated above is 500/π Hz what would be the reactance in the circuit?

(Inductance (L) = 0.9H, Capacitance (C) = \(2 \times 10^{-6}\)

A. 0.0009Ω/π
B. 100Ω
C. 1030Ω
D. 400Ω
E. 2500Ω

View Answer & Discuss (7) WAEC 1990

Calculate the resistance of the filament of a lamp rates 240 V, 40 W

A. 240Ω
B. 360Ω
C. 720Ω
D. 1440Ω
E. 2880Ω

View Answer & Discuss WAEC 1990

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Physics 1990 WAEC Past Questions

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