Home
Class 12
PHYSICS
Assertion: Fuse wire must have high resi...

Assertion: Fuse wire must have high resistance and low melting point.
Reason: Fuse is used for small current flow only

A

If both assertion and reason are true and the reason in the correct explanation of the assertion.

B

If both assertion and reason are true but the reason is not correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
C
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    FULL MARKS|Exercise Additional Questions Solved (Short Answer Questions)|9 Videos

  • CURRENT ELECTRICITY

    FULL MARKS|Exercise Additional Questions Solved (Long Answer Questions)|4 Videos

  • CURRENT ELECTRICITY

    FULL MARKS|Exercise Additional Questions Solved (Match the following)|4 Videos

  • COMMUNICATION SYSTEMS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS  (Additional problems)|3 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    FULL MARKS|Exercise ADDITIONAL QUESTIONS -( ADDITIONAL NUMERICAL PROBLEMS : )|10 Videos

Similar Questions

Explore conceptually related problems

The fuse wire is made up of a material whose melting point is relatively high.

Would you prefer a material having a high melting point or a low melting point to be used as a cathode in a diode?

Knowledge Check

  • Assertion : Covalent crystals have the highest melting point Reason : Covalent bonds are stronger than ionic bonds

    A
    Both assertion and reason are true and reason is the correct explanation of assertion.
    B
    Both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    Assertion is true but reason is false
    D
    Both assertion and reason are false.

  • Assertion (A) : Solid CO_(2) Solid NH_(3) have higher melting points Reason (R): The constituents are molecules formed by polar covalent bonds. They are held together by relatively strong dipole- dipole interactions.

    A
    A is correct but R is wrong
    B
    A is wrong but R is correct
    C
    A and R are correct and R is the correct explanation of A.
    D
    A and R are correct but R is not the correct explanation of A

  • Assertion : For measurement of specific resistance of a metallic wire, AC current is used. Reason : This is to prevent electrolysis

    A
    (A) and (R) are true and (R) is the correct explanation of (A)
    B
    Both (A) and (R) are true but (R) does not explain (A)
    C
    (A) is true but (R) is false
    D
    Both (A) and (R) are false

    • Similar Questions

    Explore conceptually related problems

    Alkali metals have low melting and boiling point. Density of alkali metals is very low. Give reason

    A ring is made of wire having a distance R_0 = 12Omega . Find the points A and B as shown in figure,at which a current carrying conductor should be connected so that the resistance R of the sub circuit between these points is equal to 8/3Omega

    Fuse wire : Low melting point :: Tungsten : ___________

    Assertion (A) : Diamond and Silicon carbide are very hard and have high melting point. Reason (R) : In covalent solids, the atoms are bound together in a three dimensional network entirely by covalent bonds.

    Assertion (A): Haloalkanes have higher boiling point and melting point than the parent alkanes having the same number of carbon. Reason (R): The intermolecular forces of atraction and dipole-dipole interactions are stronger in haloalkanes.

    Home
    Profile