Advertisements
Advertisements
प्रश्न
What material is used for making wire to prepare heating coils? Give a reason.
Advertisements
उत्तर
Nichrome is used for making wire to prepare heating coils. The reason is that its melting point is high and its resistivity is also high.
संबंधित प्रश्न
Complete the following :-
(a)
If the length of a wire is doubled by taking more of wire, what happens to its resistance?
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.).
Calculate the equivalent resistance between the points A and B for the following combination of resistors:
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.
Calculate the value of the resistance which must be connected to a 15 ohm resistance to provide on effective resistance of 6 ohm.
Calculate the quantity of heat that will be produced in a coil of resistance 75 Ω if a current of 2A is passed through it for 2 minutes.
Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances.
In an electrical circuit, two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be ______.
