Name the current carriers in electrolytic solutions or liquid conductors. (K) 15. Name the current carriers in discharge tubes or gaseous conductors. (K) 16. State Ohm’s law. (K) 17. Define resistance of a metallic conductor. (U) 18. Write the SI unit of resistance. (K) 19. Define SI unit of resistance. (U) 20. How does the resistance of a conductor depend on its length? (U) 21. How does the resistance of a conductor depend on its area of cross section? (U) 22. Define electrical conductance. (U) 23. Mention the SI unit of conductance. (K) 24. Define resistivity of a material of a conductor. (K) 25. A wire of given resistivity is stretched to three times its length .What will be its new resistivity? (A) 26. Mention the relation between the resistance and resistivity? (U) 27. Mention the SI unit of resistivity? (K) 28. Define the term current density (j) (U) 29. Write the SI unit of current density. (K) 30. Is current density a scalar or a vector quantity? (K) 31. Define electrical conductivity. (U) 32. Mention the relation between current density and conductivity. (U) 33. Define drift velocity. (U) 34. What is the average velocity of free electrons in a metal at room temperature? (K) 35. What is the effect of temperature on the drift speed of electrons in a metallic conductor? (U) 36. Define relaxation time or mean free time. (U)
2 nd PUC PHYSICS QUESTION BANK 37.What is the effect of relaxation time of electrons on the conductivity of a metal? 38.Define electron mobility. (U) 39.Mention the SI unit of mobility. (K) 40.Write the expression for mobility in terms of relaxation time. (U) 41.Name a material whose resistivity decreases with the rise of temperature. (K) 42.How does the resistance of an insulator change with temperature? 43.What will be the value of resistance of a resistor having four colour bands in the order red, red, orange and gold? 44.Write the value of resistance of a resistor having four colour bands in the order brown, red, black and silver? 45.The value of resistance of a resistor is 2.5310%. Write the colour sequence of the resistor. 46.Write the colour code for the resistors of resistance 500Ω, 5KΩ, 37Ω, 4.5X10 47.The colour sequence is Brown, black, red and gold on a resistor. Write its resistance value. (U) 48.The value of resistance of a resistor is 0.110%. Write the colour sequence of the resistor.(A) 49.What is the colour of the third band of a coded resistor of resistance 5.55Ω? 50.Draw a graph indicating the variation of resistivity of copper with temperature. (S) 51.Represent graphically the variation of resistivity of nichrome with temperature.
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- Fall '19
- Electric charge, Vijaya P U college