Question Library

Which of the following actions is necessary in order to tune a string to produce a note of an octave higher than its fundamental?

Which of the following factors does not affect the capacitance of a parallel plate capacitor?

The equivalent capacitance of a 3\(\mu F\) capacitor and a 6\(\mu F\) capacitor connected in parallel is

Which of the following statements about a bar magnet is correct?

The diagram above shows the speed-time graph of a car.If the car covered a total distance of 600m in 25s, calculate its maximum speed

Determine the magnitude of P in the diagram above

You have been provided with a rectangular glass prism, optical pins, and other necessary apparatus. Using the above diagram as a guide, carry out the following instructions: Fix the drawing paper provided to the drawing board Place the glass prism on the drawing paper and trace the outline, ABCD of the prism Remove the prism, mark a point O on AB such that AO is about one-quarter of AB Draw a normal through point O. Also draw an incident ray to make an angle i = 25 with the normal at O. Fix two pins at \(P_1\) and \(P_2\) On the incident ray. Replace the prism. Fix two other pins at \(P_3\) and \(P_4\) such that the pins appear to be in a straight line with the images of the pins at \(P_1\) and \(P_2\) when viewed through the block along DC remove the prism. Join points Pa and P4 and produce it to meet DC at 1. Also, draw a line to join Ol ( With O as center and using any Concinient radius, draw a circle to Cut the incident ray and the refracted ray at E and H respectively. Maintain this radius throughout the experiment Draw the perpendiculars EF and GH. Measure and record d= EF and I= GH. Repeat the procedure for four other values of i = 35^\circ, 45, 55^\circ, and 65^\circ respectively. In each case measure and record d and I Plot a graph of d on the vertical axis against I on the horizontal axis Determine the slope of the graph State two precautions taken to ensure accurate results. [Attach your traces to your answer booklet) (b)i. State Snell's law. ii. Calculate the critical angle for a water-air interface. [refractive index of water = \(\frac{4}{3}\)]

A particle is projected horizontally at 10 ms\(^{-1}\) from a height of 45m. Calculate the horizontal distance covered by the particle before hitting the ground. [g = 10ms\(^{-1}\)]

A particle dropped from a vertical height and falls freely for a time interval t. Sketch and explain a graph to show how h varies with (a) t (b) t\(^{2}\).

Use the figures above to answer the question below Which of the following diagrams represents correctly an n-p-n transistor?

I. reproducibility II. Sensibility III. High thermal capacity iv. High accuracy The quantities of a good thermometer include?

When impurities are added to semi-conductors, the conductivity of the semi-conductor

The pair of physical quantities consisting of vectors only are

In an ideal wheel an axle system, R stand for the radius of the wheel and r is the radius of the axle. the mechanical advantage is

A silicon material is dopped with an element of a certain group and an n-type semi-conductor is formed. the most likely group of the element is