TS EAMCET 2022 (Online) 18th July Evening Shift | Current Electricity Question 46 | Physics

A cylindrical metallic wire is stretched to increase its length in such a way that the metallic wire changes its resistance by $6 \%$. The percentage increase in its length is

$2 \%$

$4 \%$

$3 \%$

$12 \%$

TS EAMCET 2022 (Online) 18th July Evening Shift

MCQ (Single Correct Answer)

-0

Find the current in the three resistors as shown in the following figure?

TS EAMCET 2022 (Online) 18th July Evening Shift Physics - Current Electricity Question 22 English

$i_1=0, i_2=\frac{4 V}{R}, i_3=\frac{2 V}{R}$

$i_1=0, i_2=0, i_3=0$

$i_1=0, i_2=\frac{2 V}{R}, i_3=\frac{4 V}{R}$

$i_1=0, i_2=\frac{2 V}{R}, i_3=\frac{2 V}{R}$

TS EAMCET 2022 (Online) 18th July Evening Shift

MCQ (Single Correct Answer)

-0

The resistivity of a material is found to be $10^8 \Omega-\mathrm{m}$, then the material would be

Only insulator

Only metal

Only semiconductor

Only Superconductor

TS EAMCET 2022 (Online) 18th July Morning Shift

MCQ (Single Correct Answer)

-0

A metal wire of length $L$ and radius $r$ has a resistance $R$. If a wire of the same metal of length $2 L$ and radius $3 r$ is taken, then what will be its resistance?

$\frac{2}{9} R$

$\frac{2}{3} R$

$\frac{2}{9 \pi} R$

$\frac{2}{3 \pi} R$

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