Electrical Engineering - Series Circuits - Discussion

Discussion :: Series Circuits - General Questions (Q.No.1)

1. 

When a fourth resistor is connected in series with three resistors, the total resistance

[A]. increases by one-fourth
[B]. increases
[C]. decreases
[D]. remains the same

Answer: Option B

Explanation:

No answer description available for this question.

R.Ramprakash said: (Dec 14, 2010)  
R1=4ohms;R2=3ohms Since it is connected in series.
R=4+3=7ohms. Ans.Increases.

Kartheek said: (Feb 21, 2011)  
In series Rt=R1+R2+R3+R4+ ...

Pooms said: (May 19, 2011)  
The effective resistance in series is the sum of resistance. Therefore if a resistance is added in series,the overall resistance will increase. Answer-INCREASES

Bharathkumar39 said: (Aug 19, 2011)  
We know that in series combination R = R1+R1+R3+R4+ .... Rn.

So resistance will increase.

Gurmangat said: (Sep 18, 2011)  
R=R1+R2=R3+R4+............Rn

So resistance will increase.

Priya.R said: (Sep 20, 2011)  
In series combination R = R1+R1+R3+R4+ .... Rn.

So resistance will surely increase

Sadik said: (Jan 4, 2012)  
Before three resister which conection.

Bhagirath said: (Apr 11, 2012)  
SUPPOSE,R1=5OHM, R2=6OHM R3=4OHM SO R4=?
IN SERIES, THE RESISTANCE IS 1/R,SO,
R1+R2+R3+R4=MORE THEN R1+R2+R3
SO, RESISTANCE IS INCREASE.

Boss said: (Apr 30, 2012)  
Since the value of the resistors is not given ,assuming that the fourth resistor R is connected in series with three more resistors the net resistance is R1+R2+R3+R4 = R+R+R+R =4R.

The 4th resistor added increases the resistance by one fourth.( if all the resistance are equal)

Binu Shrivastava said: (Jun 11, 2012)  
Suppose r1=1ohm, r2=2ohm, r3=3ohm.
Then we know in series R=r1+r2+r3.
i.e 1+2+3=6ohm.
Therefore by adding one more resistance it's resistance automatically increases as per in series circuit.

Meena said: (Dec 15, 2012)  
Suppose when three resistances are added together then the resistance value will increases, because we know that when they are connected in series then the result will be R=r1+r2+r3.

Sravya said: (Jan 27, 2013)  
When the resistances are connected in series all the resistances are added hence the value of resistance increase.

Vasantha said: (Aug 25, 2013)  
R1 = 6 ohm R2=4 ohm when these two are connected in series i.e. R1+R2=10 ohm so the value is gradually increase so like this the value of the fourth resistor is also increases.

Kalai said: (Nov 7, 2013)  
We know that resistance are connected series R=R1+R2+R3...+Rn.

Resistance increase.

Sher Singh Meena said: (May 20, 2014)  
Because we know that,

R = R1+R2+R3+.......+Rn.

So if another resistor is connected in series then total resistance of the circuit will be increase.

Parth M Dodia said: (Jul 26, 2014)  
When resistors are in the series connection, it's resistance are increased because the formula of the series connections is R=R1+R2+R3+....+Rn.

Thanu said: (Feb 18, 2015)  
In a series circuit is R=R1+R2+R3+R4. So resistance will be increase.

Santosh said: (Jul 6, 2015)  
Resistance in series so are R1+R2+R3+R4+.....

Pandya Smit said: (Jul 30, 2015)  
r1+r2+r3 = R.

Resistance are in series so R+r4 . So increase.

Utkarsh Soni said: (Sep 9, 2015)  
Obviously the resistance will increase because there's a series connection.

Answer won't be option A, because in series connection there be always addition not multiplication.

Mukesh Kumar said: (Feb 7, 2017)  
In the circuit, the total resistance is increased so by ohms law.
r =v/i.

Danish Kamal said: (Mar 2, 2017)  
Increases, because in Series Circuit.

Rt = R1 + R2 + R3 + R4.

Sukhwinder Singh said: (Mar 20, 2017)  
Series resistance increases and current is same R = r1 + r2 + r3 + r4.

Romaine Thmpson said: (May 8, 2018)  
Thank you for explaining the answer.

Subhash said: (May 15, 2018)  
In a series connection, the total resistance is equal to the sum of all resistors as new resistor is added, resistance increases.

For example : if resistors are 1,2,3 ohms then total resistance is 6 ohms.
If 4 ohms is added then total becomes 10 ohms.

HENCE PROVED.

Sadiqul Islam Shamim said: (Jan 24, 2019)  
R1=4ohms; R2=3ohms Since it is connected in series.
R=4+3=7ohms.
Answer is Increases.

Supriya said: (Oct 31, 2019)  
In series Rt = R1+R2+R3+R4+ ..

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