Question

plz plz answer it.......................​

Answer 1

Answer:

1. option a

reason: H=I²Rt ( H is heat and R is resistance)

if current flow and time is constant

then H is directly proportional to R

equivalent resistance is more for series connection than parallel connection

therefore more the resistance more the heat dissipated.

2.(I)option d

reason: resistivity is a property of the material used therefore it doesn't depends on the length or area.

but resistance depends on the length and area of cross section

ii) option d

reason: voltmeter is a device used to measure potential difference across the circuit and it must be connected parallel to the circuit in order to offer more resistance

3. option c

reason: alloys have infinite resistance, that's why

it is dissipates larger heat.

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