(i) A wire of resistivity p is stretched to double it's length, what is it's new resistivity. Give reason for your answer. (ii) Draw a schematic diagram of a circuit consisting of a battery of three cells of 2V each, a 511 resistor, 80 resistor and 120 resistor and a plug key all connected in series. (iii) Two wires, one of copper and other of manganese have equal lengths and equal resistances. Which is thicker ? (Given that resistivity of manganese is lower than that of copper.) CBSE Class X Science SA 2 (3 Marks)

(i) A wire of resistivity p is stretched to double it's length, what i

1.	(i) A wire of resistivity p is stretched to double it's length, what is it's new resistivity. Give reason for your answer. (ii) Draw a schematic diagram of a circuit consisting of a battery of three cells of 2V each, a 511 resistor, 80 resistor and 120 resistor and a plug key all connected in series. (iii) Two wires, one of copper and other of manganese have equal lengths and equal resistances. Which is thicker ? (Given that resistivity of manganese is lower than that of copper.) CBSE Class X Science SA 2 (3 Marks)
Answer» tion:1. half of the RESTIVITY before DOUBLING it because length of the wire is inversly proportional to resistance2. in FIG3. manganese

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