The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below:

I (amperes): 0.5, 1.0, 2.0, 3.0, 4.0

V (volts): 1.6, 3.4, 6.7, 10.2, 13.2

Plot a graph between V and I plotted by using the given data. ( CBSE 2012) 

Three 2Ω resistors, A,B and C, are connected as shown in the figure. Each of them dissipates energy and can withstand a maximum power of 18 W without melting. Find the maximum current that can flow through the three resistors.

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A copper wire has diameter 0.5 mm and resistivity of 1.6 x 10^-8 m. What will be the length of this wire to make its resistance 10? How much does the resistance change if the diameter is doubled? ( CBSE 2009, 2006)

A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistance, which may be used separately, in series, or in parallel. ( CBSE 2015, 2007)

Study the following circuit and answer the following questions.

i. State the type of combination of the two resistors in the circuit.

ii. How much current is flowing through (a) 10 Ω register?

iii. What is the ammeter reading? ( CBSE 2011)