Home
Class 12
PHYSICS
From some insturments, current measured ...

From some insturments, current measured is `i=10.0Amp`. Potential difference measured is `V=100.0V`, length of wire is `31.4cm`, and diameter of wire is `2.00mm` (all of correct significant figures). The resistivity of wire (in correct significant figure) will be (use `pi=314`)

A

`1.00 xx 10^(-4) Omega - m`

B

`1.0 xx 10^(-4) Omega - m`

C

`1 xx 10^(-4) Omega - m`

D

`1.000 xx 10^(-4) Omega - m`

Text Solution

Verified by Experts

The correct Answer is:
C
`rho = (pi D^(2))/(4L) (v)/(i) = ((3.14)(2.00 xx 10^(-3))^(-2))/(4(0.314)) ((100.0)/(10.0))`
`rho = 1.00 xx 10^(-4) Omega - m`
Promotional Banner

Similar Questions

Explore conceptually related problems

From some instruments current measured is I=10.0amp , potential different measured is V=100.0 V , length of wire is 31.4 cm , and diameter of wire is 2.00mm (all in correct significant figure). The resistivity of wire (in correct significant figures)will be (use pi=3.14 )

In an experiment, current measured is, I = 10.0 A , potential difference measured is V = 100.0 V , length of the wire is 31.4 cm and the diameter of the wire 2.00 mm (all in correct significant figures). Find resistivity of the wire in correct significant figures. [Take pi = 3.14 , exact]. (a) (b) (c) (d) .

Radius of a wire is 2.50 mm. The length of the wire is 50.0 cm. If mass of wire was measured as 25g, then find the density of wire in correct significant figures. [Given, pi = 3.14, exact]

A thin wire has a length of 21.7 cm and radius 0.46 mm. Calculate the volume of the wire to correct significant figures.

A thin wire has length of 21.7 cm and radius 0.46 mm. Calculate the volume of the wire to correct significant figures?

A thin wire has length of 21.7 cm and radius 0.46 mm. Calculate the volume of the wire to correct significant figures?

In the experiment of Ohm's law, when potential difference of 10.0 V is applied, current measured is 1.00 A. If length of wire is found to be 10.0cm and diameter of wire 2.50 mm, then find maximum permissible percentage error in resistivity.

If the length of wire is (100.0 cm) and radius of wire as measured from screw gauge is (1.00mm) then the specific resistance of wire material is .

The diameter of a wire is measured to be 0.0250 xx 10^(-4) m. The number of significant figures in the measurement is

If resistance S in RB=300Omega , then the balanced length is found to be 25.0 cm from end A . The diameter of unknown wire is 1mm and length of the unknown wire is 3.14cm . The specific resistivity of the wire should be