Advertisements
Advertisements
प्रश्न
Name a substance of which the resistance remains almost unchanged by the increase in temperature.
Advertisements
उत्तर
Manganin
संबंधित प्रश्न
Find the expression for the resistors connected in series and write the two characteristics of it. (Draw figure).
When a 4 Ω resistor is connected across the terminals of a 12 V battery, the number of coulombs passing through the resistor per second is:
(a) 0.3
(b) 3
(c) 4
(d) 12
How does the presence of impurities in a metal affect its resistance?
Calculate the combined resistance in each case:

You are supplied with a number of 100 Ω resistors. How could you combine some of these resistors to make a 250 Ω resistor?
How will you oonnect five resistors, each of the value one ohm, to obtain an equivalent resistance of 0.2 `Omega`
Write an expression for calculating electrical power in terms of current and resistance.
Calculate the equivalent resistance between the points A and B for the following combination of resistors:
What should be the length of a nickel wire of area of cross-section 3 mm2 used for making a rheostat of 750 ohm? (ρ of nickle = 0.069 Ohm mm2/m)
