Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
A/c to Ohm's law
R = `"V"/"I"`
Here, V = 240 volt and I = 6 A
R = `240/6` = 40 Ω
Thus the resistance of the electriciron is 40 Ω
APPEARS IN
संबंधित प्रश्न
Give one example to show how the resistance depends on the nature of material of the conductor.
How does the resistance of a wire change when:
its length is tripled?
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.).

Answer the following question.
While studying the dependence of potential difference ( V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph between V and t. He got a straight line graph passing through the origin. What does the straight-line signify? Write the method of determining the resistance of the resister using this graph.
A given metallic wire of resistance R is doubled on itself. What will be its new resistance?
Name the material of wire used for making standard resistances. Give a reason.
State expression for Cells connected in parallel.
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 ______.
