Advertisements
Advertisements
Question
Find the effective resistance in the following circuit diagrams (Fig.):
Advertisements
Solution
(b) In the given network, the parallel combination of resistors 40 Ω and 120 Ω is connected in series with the 10 Ω and 20 Ω resistors.
:. Resistance in para!! el is:
`1/"R"_"P" = 1/40 + 1/120 = 4/120 = 1/30`
.·. `"R"_"p"` =3Ω
Effective resistance between P and Q is
R = 10 + 30 + 20 = 60 Ω
APPEARS IN
RELATED QUESTIONS
A current of 4 A flows around a circuit for 10 s. How much charge flows past a point in the circuit in this time?
A Radio Set Draws a Current of 0.36 a for 15 Minutes. Calculate the Amount of Electric Charge that Flows Through the Circuit.
How many electrons are flowing per second past a point in a circuit in which there is a current of 5 amp?
A wire of uniform thickness with a resistance of 27Ω is cut into three equal pieces and they are joined in parallel. Find the equivalent resistance of the parallel combination.
What is the criteria for selecting a fuse wire?
An electric bulb is rated at 220 V, 100 W.
- What is its resistance?
- What safe current can be passed through it?
My mother was operating washing machine on Sunday morning. Suddenly, she saw a spark coming out of the electric board and the electric current in the house failed. An electrician was called to look into the matter. What should he have noticed.
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
