Question

register having resistance 8 15 ohm 20 ohm 10 ohm are connected in paralled what is the effective resistance in the circuit
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Answer 1

Answer:

i dont now

Explanation:

what are you saying

Answer 2

Answer:

As we all know that Resistors can be connected in series or in parallel connection.

When resistors are connected in series, then the equivalent resistance of all series connected resistors will be the sum of all individual resistors. We have to just simply add those individual resistors.

R1 + R2 + R3 … + Rn = Req (In series connection)

Similarly,

When resistors are connected in parallel, then the equivalent resistance of all parallel connected resistors will be the lowest value of all individual resistors values. We have to just simply divide those individual resistors.

1/R1 + 1/R2 + 1/R3 … + 1/Rn = 1/Req (In series connection)

Please check the attached images.

The above explanation is very necessary to give you a basic idea, so for the next time, you will solve these types of questions by yourself instead of asking it here.

Now the actual question,

Resistors having a resistance of 15 ohms, 20 ohms. and 10 ohms are connected in parallel. What is the effective resistance in the circuit?

We know the basic formula, as I have defined above. Please use it.

1/R1 + 1/R2 + 1/R3 … + 1/Rn = 1/Req

Putting the values of R1, R2, R3

1/15 + 1/20 + 1/10 = 1/Req

Now, taking L.C.M of three

{1(20*10) + 1(15*10) + 1(15*20)}/15*20*10 = 1/Req

(200 + 150 + 300)/3000 = 1/Req

650/3000 = 1/Req

13/60 = 1/Req

Cross Multiply

13*Req = 1*60

13*Req = 60

Req = 60/13

Req = 4.615 ohms