A ball is swung in a horizontal circle of centre O with a constant speed. acceleration?

• A. Away from O
• B. Along the Circumference of the circle
• C. Toward centre O
• D. Along a tangent to the circle

In the diagram below, a bulb is lit by drawing 2.0A from 440V a.c. source. Calculate the cost of keeping the bulb on for two days at $0.40 per kilowatt-hour .

• A. $16.90
• B. $84.48
• C. $1690.00
• D. $8.48

Which of the following statements is an effect of compressing gas molecules at constant temperature?

• A. The pressure on the molecules decreases.
• B. The molecules gain more kinetic energy.
• C. The molecules make more impact per second on the walls of the container.
• D. The molecules increase in size

The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.

• A. (3.7, 7.4)
• B. (6.2, 9.9)
• C. (2.5, -4 .8).
• D. (14.7, 1.4)

State three observable phenomena where a particle behaves like waves. State the scientific principle underlying the operation of fibre optics.

(b) Explain each of the following terms as used in fibre optics: (i) core; (ii) cladding

The diagram below is an illustration of an a.c. circuit.Calculate the reactance of the capacitor.

• A. 2016Ω
• B. 2000Ω
• C. 200Ω
• D. 4000Ω

(a) Name two artificial satellites.

(b) A geostationary satellite moves in an orbit of radius 6300 km. Calculate the speed with which it moves in the orbit. π = \(_{22}{7}\)

Which of the following statements about the universal gravitational constant, G, is true?

• A. It is fundamental quantity.
• B. It has dimension M^-1L³T^-2
• C. Its S.I. unit is N m²kg
• D. It is a vector quantity

A student wishes to measure the potential difference across a resistor,R. She has a galvanometer,G and some connecting wires.

What else does she need?

• A. high value resistor connected in parallel with G
• B. . low value resistor connected in parallel with G low value
• C. resistor connected in series with G
• D. high value resistor connected in series with G.

An electric circuit consists of a resistor. a battery and a key. If the voltage of the battery is increased, there Would be an increase in the?

• A. current and resistance only.
• B. current resistance and temperature.
• C. current and temperature only.
• D. resistance and temperature only