# Experimental Skills-Resistivity of the Material (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 1 - 2 of 2

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## Passage

Read the passage given below and answer the questions that follow:

Consider a block of conducting material of resistivity ′ ρ ′ shown in the figure. Current I enter at ‘A’ and leaves from ‘D’. We apply superposition principle to find voltage ∆ V’ developed between ‘B’ and ‘C’. The calculation is done in the following steps:

(i) Take current T entering from ‘A’ and assume it to spread over a hemispherical surface in the block

(ii) Calculate field E (r) at distance ‘r’ from A by using Ohm’s law E = ρ j, where j is the current per unit area at ‘r’.

(iii) From the V dependence of E (r), obtain the potential V (r) at r.

(iv) Repeat (i), (ii) and (iii) for current

## Question number: 1 (1 of 2 Based on Passage) Show Passage

» Experimental Skills » Resistivity of the Material

MCQ▾

### Question

∆V measured between B and C is,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 2 (2 of 2 Based on Passage) Show Passage

» Experimental Skills » Resistivity of the Material

MCQ▾

### Question

For current entering at A, the electric field at a distance ‘r’ from A is

### Choices

Choice (4) Response

a.

b.

c.

d.

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