PHYSICS PRACTICAL This is One Of
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ELECTRICITY Connect the circuit
at shown in the diagram above:-
Close the key k. read and record
the emitters reading Io when
the clip is not constant wire.
Open the key with clip making
constant with the constantwire
when l=80cm. close the key read
and record the ammeter and I.
Repeat the procedure
withl=70,60,50,40 and 30
respectively in each case read
and record ammeter reading I.
evaluate I-1 . Tabulate your
readings. plot a graph of I on
the vertical axis against I-1 on
the horizontal axis starting from
the origin (0.0) Determine the
slope Sof the graph and its
intercept C Evaluate P=C/S. using
your graph determine the
current I when I=55cm. State
two precautions taken to
ensure accurate result Explain
what is mean by potential
difference between two point in
an electric circuit. State two
factor on which the resistance
of a wire depend. The resistivity
of a given wire of cross
sectional area 0.7mm¬¬¬2
is 4.9x10-4 ohm�s Calculate
the resistance oftwo length of a
wire� THATS ALL WE CAN