(a) emf is scalar or vector ?
(b) how does drift velocity of electrons in a metallic conductor vary with increase in temp. ?
(c) metallic conductor is at temp (theta1) temp increases of metaalic conductor to (theat2). how will product of its resistivity n conductivity change ?
(d) which phy quantity does the voltage vs current graph for a metallic conductor depict ?
(e) state the condition in which terminal voltage across a secondar cell is = to its emf ?
(a) emf is scalar or vector ?
(b) how does drift velocity of electrons in a metallic conductor vary with increase in temp. ?
(c) metallic conductor is at temp (theta1) temp increases of metaalic conductor to (theat2). how will product of its resistivity n conductivity change ?
(d) which phy quantity does the voltage vs current graph for a metallic conductor depict ?
(e) state the condition in which terminal voltage across a secondar cell is = to its emf ?
Due to lack of time we shall only be able to answer three questions...
(a)
Emf is a scalar quantity as it does not follow the laws of vector algebra.
.
(b)
The thermal energies possessed by the molecules increases with temperature, this would mean that their kinetic energies of motion and thus the drift velocity would also increase. Thus, drift velocity increases with temperature.
.
(d)
The physical quantity represented by the slope of the VI graph is the resistance.
Due to lack of time we shall only be able to answer three questions...
(a)
Emf is a scalar quantity as it does not follow the laws of vector algebra.
.
(b)
The thermal energies possessed by the molecules increases with temperature, this would mean that their kinetic energies of motion and thus the drift velocity would also increase. Thus, drift velocity increases with temperature.
.
(d)
The physical quantity represented by the slope of the VI graph is the resistance.
