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If the resistivity of an alloy is and t...

`If the resistivity of an alloy is ____ and that of constituent metal is p, then

A

`rho' gt rho`

B

`rho' lt rho`

C

`rho' = rho`

D

there is no simple relation between `rho` and `rho'`

Text Solution

Verified by Experts

The correct Answer is:
A
The resistivity of metal increases, when it is converted into an alloy, `rho' gt rho`.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CURRENT ELECTRICITY-EXERCISE 2
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  2. Two bars of equal resistivity rho and radius 'r' and '2r' are kept in ...

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  3. Six equal resistances are connected between points P, Q and R as shown...

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  4. A 100 W bulb B(1) and two 60 W bulbs B(2) and B(3), are connected to a...

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  5. In a region 10^(19) prop-particles and 10^(19) protons move to the lef...

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  6. The V-I graph for a good conductor makes angle 40^(@) with V-axis. Her...

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  7. If an increase in length of copper wire is 0.5% due to stretching, the...

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  8. In a neon discharge tube 2.9 xx 10^(18) Ne^(+) ions move to the right ...

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  9. If the resistivity of an alloy is and that of constituent metal is p,...

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  10. In a network as shown in the figure the potential difference across th...

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  11. A wire of lenth L is drawn such that its diameter is reduced to half o...

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  12. In a potentiometer, the null point is received at 7th wire. If now we ...

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  13. In the given circuit, it is observed that the current I is independent...

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  14. The size of a carbon block, having specific resistance. 3.5xx10^(-3)Om...

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  15. Calculate the average drift speed of conduction electrons in a copper ...

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  16. The current through a wire depends on time as, i=(10+4t) Here , i is a...

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  17. In cosmic rays 0.15 protons cm^(-2) s^(-1) are entering the Earth's at...

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  18. Consider a thin square sheet of side L and thickness t, made of a mate...

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  19. 160W-60V lamp is connected at 60 V DC supply. The number of electrons ...

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  20. Two batteries A and B whose emf is 2V are connected in series with ext...

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