Name The Factors On Which The Specific Resistance Of A Wire Depends Upon.

The specific resistance of a wire depends on the material of the wire and its temperature.

Specific resistance

Specific resistance is the resistance offered per unit length and unit cross-sectional area when a known voltage is applied. The formula of specific resistance is as follows:

\(\rho = {RA \over L}\)

Where,

  • ⍴ = Specific resistance
  • R = Resistance
  • A = Cross-sectional area
  • L = Length of the wire

The SI unit of specific resistance is ohm meter (Ωm).


Related Questions

  1. What is the necessary condition for a conductor to obey Ohm's Law?
  2. How Do You Find The Resistance Of A Wire?
  3. Why is the curve representing Ohm's law linear?
  4. What Is Effective Resistance?
  5. State Ohms law. How can it be verified experimentally?
  6. How do you find the resistance in Ohm's law?
  7. What are the 3 forms of Ohm's law
  8. How Does The Resistance Of Wire Depends On Its Radius?
  9. What Is Ohm's Law Graph?
  10. What are the limitations of Ohm's Law?
  11. What are the applications of ohm's law used in daily life?
  12. State Ohms Law. Express It Mathematically. Define Si Unit Of Resistance.
  13. Is resistance constant in Ohm's law?
  14. Draw a circuit diagram to verify ohm’s law.
  15. How many 176 Ω resistors (in parallel) are required to carry 5 A on a 220 V line?

Read More:

CBSE CLASS XII Related Questions

  • 1.
    An electric field $\vec{E}$ is established across the ends of a cylindrical conductor of length L and area of cross-section A. Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.


      • 2.
        Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.


          • 3.
            Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.


              • 4.
                A charged particle $+q$ in an electric field $\vec{E}$ experiences a force in the direction of the electric field. As a result, its kinetic energy changes. Similarly, the charged particle also experiences a force when it moves in a magnetic field $\vec{B}$. But this magnetic force is perpendicular to both velocity $\vec{v}$ of the charged particle and the magnetic field $\vec{B}$, so it cannot change the kinetic energy of the charged particle. Consider two charged particles 1 and 2 of masses $m$ and $\frac{m}{2}$ having charges $-q$ and $+2q$ respectively. They are accelerated from rest through the same potential difference $V$ and acquire kinetic energy $K_1$ and $K_2$. Then they enter in a region of uniform magnetic field $\vec{B}$ perpendicular to their velocities.


                  • 5.
                    Two copper wires having their radii in the ratio of 3 : 2 are connected in series across a battery. Find the ratio of the drift velocities of the electrons in the wires.


                      • 6.
                        A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

                          CBSE CLASS XII Previous Year Papers

                          Comments


                          No Comments To Show