Advertisements
Advertisements
प्रश्न
उत्तर
APPEARS IN
संबंधित प्रश्न
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio `"R"/"R'"` is ______.
How does the presence of impurities in a metal affect its resistance?
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
A p.d. of 4 V is applied to two resistors of 6 Ω and 2 Ω connected in series. Calculate:
(a) the combined resistance
(b) the current flowing
(c) the p.d. across the 6 Ω resistor
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
Name the material of wire used for making standard resistances. Give a reason.
State expression for Resistance connected in series.
Calculate the equivalent resistance between the points A and B for the following combination of resistors:
A metal wire of resistance 6 Ω is stretched so that its length is increased to twice its original length. Calculate its new resistance.
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be:
