Question

Table: Resistivities of some substance at (20° Celsius)
Substance. Resistivity Copper. 1.69×10^-5ohm's
Mercury. 94.0×10^-5ohm's
Iron. 6.84×10^-5ohm's
Nichrome. 110×10^-5ohm's
Paper(dry). 10^12ohm's
Nickel. 6.84×10^-5ohm's
1. The resistivity of which substance given in the table is best situated for making wires for the transmission of electricity the given circuit?
2. Which type of circuit is represented in the above circuit diagram?
(a) series circuit. (b) parallel circuit
(c) simple circuit. (d) both a and b
3. Which of the following substance is extracted by a magnet?
(a) nickel. (b) Mercury
(c) copper. (d) paper
4. How much current is flowing through the the electrical circuit given below?

Answer 1

Answer:

1)Copper due to its lowest Resistivity!

3)Copper again

2,4 no diagrams provided!

Answer 2

Answer:

1. Copper as its resistivity is very low

2. Series Circuit

3. Nickel

4. 2V (This ans wer is written after doing calculation)