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3xi)
i)I ensured that the terminals were firmly tight to prevent partial contact
ii)I avoided parallax error when taking reading from the voltmeter.
3bi)
i)temperature of wire
ii)cross-sectional area of wire
iii)length of wire
iv)nature of wire
3bii)
effective E.M.F =2V (parallel connection)
effective internal resistance =rxr/r+r=r/2 ohm
current I =0.8A
external Resistance R =2n
using
E=I(R+r)
2=0.8(2+r/2)
2.5=(2+r/2)
2.5-2=r/2
0.5=r/2
r=0.5x2=1ohms
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