The potential difference between the terminals of an electric iron is 240 V and the current is 5.0 A. What is the resistance of the electric iron? ( CBSE 2016)

Why is parallel arrangement used in domestic wiring? ( CBSE 2008)

Two electric bulbs A and B are marked 40 W – 220 V and 60 W – 220 V respectively. Which one of the two has a greater resistance? ( CBSE 2016)

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)