Advertisements
Advertisements
Question
Complete the following :-
(a)

Advertisements
Solution
(a)

The equivalent resistance is Rs = 12Ω + 2.5Ω + 2.5Ω = 17Ω
APPEARS IN
RELATED QUESTIONS
In series combination which remains constant?
(a) Voltage
(b) Current
(c) Both current and voltage
(d) Both are variables
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω, 0.5 Ω and 12 Ω, respectively. How much current would flow through the 12 Ω resistor?
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
Name the material which is used for making the heating element of an electric iron.
How does the resistance of a wire change when:
its length is tripled?
If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is :
(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω
A given metallic wire of resistance R is doubled on itself. What will be its new resistance?
What material is used for making wire to prepare heating coils? Give a reason.
How does the resistivity of an alloy such as constantace depends on temperature.
Define the term resistivity and state its S.I. unit. Which will have higher resistivity a conductor or an insulator.
The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?
Calculate the equivalent resistance between P and Q from the following diagram:
Illustrate-combination of cells e.g., three cells, in series, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
Two resistors having 2Ω and 3Ω resistance are connected—(i) in series, and (ii) in parallel. Find the equivalent resistance in each case.
Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of 4 Ω.
