Advertisements
Advertisements
Question
Give the law of combination of resistances in series.
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
Complete the following :-
(a)
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 ______.
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
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
Name the material which is the best conductor of electricity.
Name the material which is used for making the heating element of an electric iron.
How does the resistance of a pure metal change if its temperature decreases?
The diagram below shows part of a circuit:
If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:
(a) 9 Ω
(b) 4 Ω
(c) 6 Ω
(d) 18 Ω
You are supplied with a number of 100 Ω resistors. How could you combine some of these resistors to make a 250 Ω resistor?
In series combination of resistances ______.
Two bulbs of 100 W and 40 W are connected in series. The current through the 100 W bulb is 1 A. The current through the 40 W bulb will be ______.
What is a resistance? Define it with respect to Ohm’s law,
Calculate the equivalent resistance between P and Q from the following diagram:
Illustrate-combination of cells e.g., three cells, in parallel, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
Consider the following combinations of resistors:
The combinations having equivalent resistance 1 Q is/are ______.
