In a compound microscope, the image formed by the objective lens is at a distance of 3.0cm from the eye lens. Calculate the focal length of the eye lens

• A. 0.3cm
• B. 2.7cm
• C. 3.4cm
• D. 8.3cm

The property of a body that determines the direction of heat flow when the body is in contact with another body is the

• A. Heat capacity
• B. mass
• C. Power
• D. Temperature

(a) Define the following terms:

(i) Electric field intensity

(ii) Electric potential

(b) The diagram below illustrates two collinear electric charges of magnitudes + Q and -Q. The charges are equidistant from a point P at which a rest charge is placed.

Copy the diagram and use arrows to indicate, from the point P, the direction of the;

(i) electric force F\(_1\) due to + Q.

(ii) electric force F\(_2\) due to -Q.

(iii) electric field intensity E.

(c) What is meant by dielectric substance?

(ii) List the factors which determine the capacitance of a parallel plate capacitor and state the effect each of them has on the capacitance.The diagram below represents a section of a circuit. Calculate the effective capacitance in the section.

(iii)

The diagram below represents a section of a circuit. Calculate the effective capacitance in the section.

I. reproducibility

II. Sensibility

III. High terminal capacity

iv. High accuracy

The quantities of a good thermometer include?

• A. I, II and IV only
• B. I, III and IV only
• C. I, II and III only
• D. II, III and IV only

A certain wave has a speed of 20ms^-1. If the frequency of the wave is 0.25Hz, calculate the distance between successive crests of the wave

• A. 5.0m
• B. 40.0m
• C. 50.0m
• D. 80.0m

The image of an object placed at the center of the curvature of a concave mirror is

• A. Inverted and magnified
• B. at the principal focus
• C. real and diminished
• D. at the center of the curvature

A boy on looking into a mirror observed that his face appeared to have grown bigger. The boy must have been looking at a

• A. convex mirror with his face at the focus
• B. concave mirror with his face between the focus and the mirror
• C. concave mirror with his face at the focus
• D. convex mirror with his face between the focus and the mirror

A wire of length 5.0 m and diameter 2.0 mm extends by 0.25 mm when a force of 50 N was used to stretch it from its end. Calculate the;

(a) stress on the wire;

(b) strain in, the wire. [\(\pi = 3.142\)]

A reservoir is filled with a liquid of density 2000kgm^-3. Calculate the depth at which the pressure in the liquid will equal to 9100Nm^-2 [g = 10ms^-2]

• A. 0.262m
• B. 0.455m
• C. 0.664m
• D. 0.819m

An electron of mass m and charge e moves in a circular path in a magnetic field of flux density B. How long does it take to complete one orbit?

• A. \(\frac{2me}{B\pi}\)
• B. \(\frac{2B}{me\pi}\)
• C. \(\frac{2\pi m}{Be}\)
• D. \(\frac{Be}{2 \pi m}\)