a) A student performed an experiment to find out the relation between
Voltage and Current in the Laboratory. He found that a linear relation
exists between these two. State the law which supports his finding.
(b) How is an ammeter connected in an electric circuit ?
( c) The power of a lamp is 100 W. Find the energy consumed by it in 1
minute.
(d) A wire of resistance 5 Ω is bent in the form of a closed circle. Find
the resistance between two points at the ends of any diameter of
the circle.
Answers
Linear relation between current (I ) and voltage (V) is given by OHM's law I = V/R
Explanation:
relation between Voltage and Current by OHM's law
I = V/R
R = resistance
I = Current
V = Voltage
ammeter is connected in Series in an electric circuit
Voltmeter is connected in Parallel in an electric circuit
The power of a lamp is 100 W. Find the energy consumed by it in 1
minute.
1 min = 60 sec
Energy = power x time
100 x 60 = 6000 Joule = 6 kJoule
A wire of resistance 5 Ω is bent in the form of a closed circle
Each wire resistance between two points of diameter =5/2 Ω
As these will be in parallel hence net resistance
= 1/((1/(5/2) + 1/(5/2)))
= 5/4
5/4 Ω is the resistance between two points at the ends of any diameter of
the circle.
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