Current electricity questions | form two Physics

Mention three uses of current electricity.

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UNSOLVED

Why is it advised to connect bulbs in parallel arrangement during installation of electricity in most buildings?

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Form one students at Saku Secondary School who were conducting an experiment to verify Ohm's Law in the laboratory, were given the following instructions: Connect in series a resistor R, a battery B of two cells, a switch K, an ammeter A and rheostat S . Then connect a voltmeter V across resistor R . Draw a well labelled circuit representing this experiment.

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What will be the resistivity of a wire 2 metres long with a cross-sectional area of 0.50 mm​² and a resistance of 2.20 Ω

1. 5.5x10​^-7​ Ωm
2. 6.5x10​^-7 Ωm
3. 2.3x10​​^-7 Ωm
4. 1.1x10​^-6​ Ωm
5. 5.5x10​​^-6 Ωm

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UNSOLVED