Advertisements
Advertisements
प्रश्न
Two resistors having 2Ω and 3Ω resistance are connected—(i) in series, and (ii) in parallel. Find the equivalent resistance in each case.
Advertisements
उत्तर
Given: R1 = 2 Ω, R2 = 3 Ω
(i) In series : Equivalent resistance R = R1 + R2
or R = 2 + 3 = 5 Ω
(ii) In parallel : Equivalent resistance R = `("R"_1"R"_2)/("R"_1 + "R"_2)`
or R = `(2 xx 3)/(2 + 3) = 6/5 = 1.2 Omega`
संबंधित प्रश्न
If the equivalent resistance is to be increased, then the number of resistances should be connected in
- Series
- Parallel
- Mixed arrangement
- None of the above
If the length of a wire is doubled by taking more of wire, what happens to its resistance?
Name the material which is the best conductor of electricity.
Give one example to show how the resistance depends on the nature of material of the conductor.
Give the law of combination of resistances in series.
Draw a V-I graph for a conductor at two different temperatures. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?
The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?
State and explain the laws of resistance.
When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:
