268207
**Assertion :** M aterial used in the construction of a standard resistance is constantan or manganin. **Reason :** Temperature coefficient of constantan is very small.
1 Both(A) and (R) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correct explanation of A.
3 (A) is rruebut \((R)\) isfalse
4 (A) is falsebut(R) istrue
Explanation:
Current Electricity
268208
**Assertion (A) :** B ending of a conducting wire effects electrical resistance. **\(R\) eason ( \(R\) ) :** R esistance of a wire depends on resistivity of that material.
1 Both (A) and (R) aretrueand (R) isthecorrect explanation of A.
2 Both (A) and (R) are true but (R) is not the correct explanationof \(\mathrm{A}\).
3 (A) istruebut \((R)\) isfalse
4 (A) isfalsebut (R) istrue
Explanation:
Current Electricity
268209
**Assertion (A) :** W hen the radius of a copper wire is doubled, its specific resistance gets increased. **Reason ( \(R\) ):** Specific resistance is independent of cross-section of material used
1 Both \((A)\) and \((R)\) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correctexplanationof A.
268207
**Assertion :** M aterial used in the construction of a standard resistance is constantan or manganin. **Reason :** Temperature coefficient of constantan is very small.
1 Both(A) and (R) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correct explanation of A.
3 (A) is rruebut \((R)\) isfalse
4 (A) is falsebut(R) istrue
Explanation:
Current Electricity
268208
**Assertion (A) :** B ending of a conducting wire effects electrical resistance. **\(R\) eason ( \(R\) ) :** R esistance of a wire depends on resistivity of that material.
1 Both (A) and (R) aretrueand (R) isthecorrect explanation of A.
2 Both (A) and (R) are true but (R) is not the correct explanationof \(\mathrm{A}\).
3 (A) istruebut \((R)\) isfalse
4 (A) isfalsebut (R) istrue
Explanation:
Current Electricity
268209
**Assertion (A) :** W hen the radius of a copper wire is doubled, its specific resistance gets increased. **Reason ( \(R\) ):** Specific resistance is independent of cross-section of material used
1 Both \((A)\) and \((R)\) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correctexplanationof A.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Current Electricity
268206
Fuse wire is a wire of
1 low medting point and low value of \(\alpha\)
2 high melting pointand highvalueof \(\alpha\)
3 high melting point and low value of \(\alpha\)
4 low melting point and high value of \(\alpha\)
Explanation:
Current Electricity
268207
**Assertion :** M aterial used in the construction of a standard resistance is constantan or manganin. **Reason :** Temperature coefficient of constantan is very small.
1 Both(A) and (R) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correct explanation of A.
3 (A) is rruebut \((R)\) isfalse
4 (A) is falsebut(R) istrue
Explanation:
Current Electricity
268208
**Assertion (A) :** B ending of a conducting wire effects electrical resistance. **\(R\) eason ( \(R\) ) :** R esistance of a wire depends on resistivity of that material.
1 Both (A) and (R) aretrueand (R) isthecorrect explanation of A.
2 Both (A) and (R) are true but (R) is not the correct explanationof \(\mathrm{A}\).
3 (A) istruebut \((R)\) isfalse
4 (A) isfalsebut (R) istrue
Explanation:
Current Electricity
268209
**Assertion (A) :** W hen the radius of a copper wire is doubled, its specific resistance gets increased. **Reason ( \(R\) ):** Specific resistance is independent of cross-section of material used
1 Both \((A)\) and \((R)\) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correctexplanationof A.
268207
**Assertion :** M aterial used in the construction of a standard resistance is constantan or manganin. **Reason :** Temperature coefficient of constantan is very small.
1 Both(A) and (R) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correct explanation of A.
3 (A) is rruebut \((R)\) isfalse
4 (A) is falsebut(R) istrue
Explanation:
Current Electricity
268208
**Assertion (A) :** B ending of a conducting wire effects electrical resistance. **\(R\) eason ( \(R\) ) :** R esistance of a wire depends on resistivity of that material.
1 Both (A) and (R) aretrueand (R) isthecorrect explanation of A.
2 Both (A) and (R) are true but (R) is not the correct explanationof \(\mathrm{A}\).
3 (A) istruebut \((R)\) isfalse
4 (A) isfalsebut (R) istrue
Explanation:
Current Electricity
268209
**Assertion (A) :** W hen the radius of a copper wire is doubled, its specific resistance gets increased. **Reason ( \(R\) ):** Specific resistance is independent of cross-section of material used
1 Both \((A)\) and \((R)\) aretrueand (R) isthecorrect explanation of \(A\).
2 Both (A) and (R) are true but (R) is not the correctexplanationof A.