Derive the expression for the current density of a conductor in terms of the conductivity and applied electic field. Explain with reason how the mobility of electrons in a conductor changes when the potential difference applied is doubled, keeping the temperature of the conductor constant.
Electrons flow in a conductor from one point to another due to a…………………….(potential/electronic) difference between the two points.
Explain the term 'drift velocity' of electrons in a conductor. Hence obtain the expression for the current through a conductor in terms of 'drift velocity'.
The drift velocity of free electrons in a conductor is v, when a current i is flowing in it, Ifboth the radius and current are doubled, then the drift velocity will be :
How does the mobility of electrons in a conductor change, if the potential difference applied across the conductor is doubled, keeping the length and temperature of the conductor constant ?
Mobility of free electrons in a conductor is
How does the mobility of electrons in a conductor change, if the p.d. applied across the conductor is doubled, keeping its length and temperature constant?
The average velocity of electrons in a conductor in the absence of electric field is
A potential difference of 10 V is applied across a conductor of resistance 1 k Omega . Find the number of electrons flowing through the conductor in 5 minutes.
Answer the following: (i) Derive an expression for drift velocity of free electrons. (ii) How many drift velocity of electrons in a metallic conductor vary with increase in temperature ? Explain.
ICSE-ELECTRICITY AND MAGNETISM -EXERCISE (SECTION I) (Long Answer Questions)
