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A rectangular carbon block has dimension...

A rectangular carbon block has dimensions `1.0 cmxx 1.0 xx50 cm`.
(i) What is the resistance measured between the two square ends ?
(ii) Between two opposing rectangular faces ?
Resistivity of carbon at `20^(@)C" is "3.5xx10^(-5)Omegam`.

A

`(35)/2 xx10^(-2) Omega, 7xx 10^(-5) Omega`

B

`7xx 10^(-5) Omega,(15)/2xx10^(-2) Omega`

C

`(35)/2xx10^(-4) Omega, 7xx10^(-7) Omega`

D

`(15)/2 Omega 7xx 10^(-2) Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
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MOTION-CURRENT ELECTRICITY-EXERCISE -1 (OBJECTIVE PROBLEMS NEET)
  1. Reading of ideal .ammeter in ampere for the following circuit is –

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  2. The equivalent resistance in series combination is

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  3. A rectangular carbon block has dimensions 1.0 cmxx 1.0 xx50 cm. (i) ...

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  4. The equivalent resistance between points (A) and (B) in the adjoining ...

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  5. Four wires of equal length and of resistance 5ohm each are connected i...

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  6. Five resistance are connected as shown in fig. The effective resistanc...

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  7. In a closed circuit, the vector sum of total e.m.f.s is equal to the s...

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  8. For the following diagram the galvanometer shows zero deflection then ...

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  9. For following circuit the value of total resistance between X an...

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  10. Reading of ammeter is

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  11. In the following circuit the resultant emf between AB is –

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  12. Two cells , each of emf E and internal resistance r, are connected in ...

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  13. A cell of e.m.f (E) and internal resistance (r) is connected in series...

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  14. The terminal potential difference of a cell when short-circuited is (E...

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  15. A storage battery is connected to a charger for changing with a voltag...

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  16. The terminal voltage across a battery of emf E can be

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  17. In the figure shown, battery 1 has emf=6V and internal resistance = 1O...

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  18. In which of the above cells, the potential difference between the term...

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  19. Five dry cell each of e.m.f 1.5V are connected in parallel. The e.m.f ...

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  20. Two bulbs, one of 50 watt and another of 25 watt are connected in seri...

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