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In metallic conductor of conventional cu...

In metallic conductor of conventional current is____ to the direction of flow of free electrons [Fill in the blanks]

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Velocity of electric current is much more___ than the drift velocity of free electrons in a metallic conductor [Fill in the blanks].

If a current passes through a metal conducting wire of area of cross section A, the drift velocity of free electrons inside the metal is v_d=1/( n e A) , where the amount of electric charge of an electron =e and the number of free electrons per unit volume of the metal=n. The applied electric field on the wire is E=V/l , where a potential difference V exists between two points, l apart, along the length of the wire. IF R is the resistance of the wire between those two points, then the resistivity of its material is rho=(RA)/l .Besides the mobility (mu) of the free electrons inside a wire is defined as their drift velocity for a unit applied electric field. The radii of two wires ,made of two different metals are in the ratio 1:2 , The number density of free electrons in the first metal is double that in the second metal. IF the current in the first wire is 1A, then the current in the second wire producing the same drift velocity is

If a current passes through a metal conducting wire of area of cross section A, the drift velocity of free electrons inside the metal is v_d=1/( n e A) , where the amount of electric charge of an electron =e and the number of free electrons per unit volume of the metal=n. The applied electric field on the wire is E=V/l , where a potential difference V exists between two points, l apart, along the length of the wire. IF R is the resistance of the wire between those two points, then the resistivity of its material is rho=(RA)/l .Besides the mobility (mu) of the free electrons inside a wire is defined as their drift velocity for a unit applied electric field. Two copper wires have both lengths and radii in the ratio 1:2 if the ratio between the electric currents flowing through them is also 1:2 , what would be the ratio between the drift velocities of free electrons?

If a current passes through a metal conducting wire of area of cross section A, the drift velocity of free electrons inside the metal is v_d=1/( n e A) , where the amount of electric charge of an electron =e and the number of free electrons per unit volume of the metal=n. The applied electric field on the wire is E=V/l , where a potential difference V exists between two points, l apart, along the length of the wire. IF R is the resistance of the wire between those two points, then the resistivity of its material is rho=(RA)/l .Besides the mobility (mu) of the free electrons inside a wire is defined as their drift velocity for a unit applied electric field. The current through unit cross section of a conductor,called the electric current density J, is related with the applied electric field E as

In a metallic conductor, the number of free electrons per unit volume is n and the drift velocity of those electrons is v_d . Then

Thermal expansion of invar is ________ than that of all other metals or alloys. [Fill in the blank]

Define relaxation time of the free electrons drifting in a conductor.How is it related to the drift velocity of free electrons? Use this relation to deduce the expression for the electrical resistivity of the material.

If the magnetic force on a moving charged particle in a magnetic field becoms ______ the direction of motion of the particle, or its opposite direction, indicates the direction of magnetic field. [Fill in the blank

If a straight current carrying conductor remains ______ to the direction of a magnetic field, the magnetic force acting on the conductor will be zero. [Fill in the blank]

CHHAYA PUBLICATION-CURRENT ELECTRICITY -EXERCISE ( VERY SHORT ANSWER TYPE QUESTION)
  1. Two resistances 1 Omega and 2 Omega are connected in parallel and a p...

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  2. What is the value of I in the circuit of Fig.1.64?

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  3. Equivalent resistance in a parallel combination is ...... than each of...

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  4. Two resistance of 6 Omega and 3 Omega are connected in parallel when ...

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  5. A metallic wire of resistance R is folded into two equal parts and the...

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  6. The resistance of an electrical appliance is 200 Omega and it can with...

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  7. The equivalent resistance of two resistances in series is four times t...

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  8. Three resistances,each of 4 Omega, are connected in the form of an equ...

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  9. Name the quantity for which the potential difference of a cell becomes...

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  10. What is the maximum value of current available from a cell of emf 1.5 ...

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  11. IF the through a circuit or the of a cell be zero, then the value of ...

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  12. Emf, of a cell is 1.5 Vand its internal resistance is 1 Omega When the...

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  13. When a stunt of 1 Omega is connected in parallel with a galvanometer 1...

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  14. If the current through a galvanometer of resistance G is to be reduced...

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  15. A shunt of 1 Omega is connected in parallel with a galvanometer of res...

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  16. n electric cells having emf e and internal resistance r each are conne...

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  17. n electric cells of emf e and internal resistance r each are connected...

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  18. In metallic conductor of conventional current is to the direction of f...

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  19. Velocity of electric current is much more than the drift velocity of f...

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  20. The potential difference across a given copper wire is increased.What ...

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