(a) You are provided with a battery, an ammeter, a voltmeter, a resistance box, a key and connection wires.

(i) Set up circuit as shown in the diagram above.

(ii) With the key opened, measure and record the e.m.f. E\(_o\) of the battery

(iii) With the key closed, select the resistance R=1 on the resistance box. Read and record the current, 1Ω.

(iv) Evaluate I\(^{-1}\).

(v) Repeat the procedure for five other values of R=2Ω,3Ω, 4Ω, 5Ω, and 6Ω.

In each case, record I and evaluate I\(^{-1}\) results.

(vii) Plot a graph with R on the vertical axis and I\(^{-1}\) on the horizontal axis.

(Viii) Determine the slope, s, of the graph.

(ix) Determine the intercept C, On the vertical axis.

(x) State two precautions taken to ensure accurate results.

(b)(i) Define potential difference in an electric field.

(ii) A piece of resistance wire of diameter 0.2 mm and length 25 cm has a resistance of 7Ω. Calculate the resistivity of the wire of the battery. [ π = 22\7]

The area under a force-time graph represents--------

From the principle of flotation, a body sinks in a fluid until it displace a quantity equal to its own?

The length of a simple pendulum is increased by a factor of four. By what factor is its period increase?

The linear expansivity, \(\alpha\), and cubic expansivity, \(\gamma\), of a material are related by the equation?