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#9 | Ohm's Law in Vector Form
(Physics) > Current Electricity
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3.  $32\mathrm{\Omega }$

4.

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

1.  220

2.  440

3.  310

4.  550

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Three copper wires have their lengths in the ratio 5:3:1 and their masses are in the ratio 1:3:5. Their electrical resistance will be in the ratio of :

1. 5:3:1

2. 1:3:5

3. 125:15:1

4. 1:15:125

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The resistivity of iron is 1 × 10–7 ohm m. The resistance of iron wire of particular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in ohm m will be :

(1) 1 × 10–7

(2) 2 × 10–7

(3) 4 × 10–7

(4) 8 × 10–7

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

When the length and area of cross-section both are doubled, then its resistance :

(1) Will become half

(2) Will be doubled

(3) Will remain the same

(4) Will become four times