Advertisements
Advertisements
प्रश्न
State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator.
Advertisements
उत्तर
Metal < Semiconductor < Insulator
संबंधित प्रश्न
Find the expression for the resistors connected in series and write the two characteristics of it. (Draw figure).
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
Calculate the resistance of an aluminium cable of length 10 km and diameter 2.0 mm if the resistivity of aluminium is 27 × 10−8 Ωm.
Name a substance of which the resistance remains almost unchanged by the increase in temperature.
A graph is plotted taking p.d. along y-axis and electric current along x-axis. Name the physical quantity that represents the slope of this graph (Fig.).
Write an expression for calculating electrical power in terms of current and resistance.
In the circuit shown below, calculate the equivalent resistance between the points (i) A and B, (ii) C and D.
