1999 WAEC SSCE Physics Past Questions

1999

The voltage and current in the primary of a transformer are 200V and 2Arespectively. lf the transformer is used to light ten 12 V, 30 W bulbs, calculate its efficiency.

1999

Magnetic flux density is defined as the

1999

A resistance wire of length 2 m and of uniform cross-sectional area 5.0 x 10-7 m2 has a resistance of 2.2 Ω Calculate its resistivity

1999

A point charge of magnitude 2μC is moved through a distance of 0.02 m against uniform field of intensity 25 Vm-1 Calculate the work done on the charge

1999

Which of the following are the essential parts of an atomic bomb?

1999

The half-life of a radioactive element is 5 Calculate its decay constant

1999

The half-life of a radioactive substance is

1999

A metal has work function of 4.375 eV Calculate its threshold frequency. (h = 6.6 x 10-34Js; 1eV = 1.6 x 10-19J)

1999

Which of the following is not a safety precaution in a nuclear station?

1999

In the actual exam, a setup will be provided that includes connecting a circuit with an accumulator, a resistance box, a rheostat, an ammeter, and an additional resistor Q. The circuit is arranged as shown in the diagram…

1999

In the actual exam, a setup will be provided that includes a glass block on a sheet of paper, tracing the outline of the block, and performing a refraction experiment. The experiment involves drawing incident rays at var…

1999

In the actual exam, a setup will be provided involving a thread AC fixed at a pulley A, passing over a pulley C on a force board, carrying an unknown mass m₀. A line is drawn along the direction of AC on paper behind the…

1999

(a) Explain: (i) Fusion. (ii) Fission.(b) State three advantages of fusion over fission in the generation of power(c) Calculate in joules, the binding energy for\(\frac{59}{27}\) Co(Atomic mass of \(^{59}_{2} Co\) = 58.9…

1999

(a) Sketch the magnetic flux pattern around a long; straight, current-carrying wire(b) State two methods by which the sensitivity of a moving-coil galvanometer can be increased.(c) A series RLC circuit comprises a 100-\(…

1999

(a) State three properties of waves(b)(i) Describe, with the aid of a labelled diagram, an experiment to show how the frequency of the note emitted by a vibrating string depends on the tension in the string(ii) State two…

1999

(a) Explain (i) work: (ii) power(b) Show that the efficiency E, the force ratio M.A. and the velocity ratio V.R. of a machine are related by the equation: E = M.A. x 100% V.R.(c) An inclined plane of angle 15° is used ra…

1999

(a) State the conditions for the equilibrium of a rigid body acted upon by parallel forces(b)(i) Describe an experiment, using the principle of moments, to determine the mass of a metre rule(ii) State two precautions nec…

1999

(a) State Heisenberg's uncertainty principle.(b) Mention two phenomena that can only be explained in terms of the particulate nature of light.

1999

(a) Explain electrolysis(b) Classify the following substances as electrolytes and non-electrolytes: Sugar solution: paraffin, suit solution and grape fruit juice.

1999

(a) State Hooke's law of elasticity(b) A spiral spring, loaded with a piece of metal, extends by 10.5cm hair. When the metal is fully submerged in water, the spring extends by 6.8cm. Calculate the relative density of the…

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