An electric lamp whose resistance is 20 and a conductor of 4 resistance are connected to a 6 V battery Calculate a the total resistance of the circuit b the current through the circuit and c the potential difference acr

The Eduladder is a community of students, teachers, and programmers just interested to make you pass any exams. So we solve previous year question papers for you.
See Our team
Wondering how we keep quality?
Got unsolved questions?

Ask Questions

Hey, We have just launched eduladder videos.Looking for creators and contributors Read Guideline
GE6252-Basic-Electrical-and-Electronics-Engineering-Anna-university-notes-->View question


An electric lamp, whose resistance is 20 Ω, and a conductor of 4 Ω resistance are connected to a 6 V battery. Calculate (a) the total resistance of the circuit, (b) the current through the circuit, and (c) the potential difference acr




By:milan-ransingh

Taged users:


Likes:
Be first to like this question

Dislikes:
Be first to dislike this question

Talk about thisDelete|Like|Dislike|


Answers

The resistance of electric lamp, R1 = 20 Ω,
The resistance of the conductor connected in series, R2 = 4 Ω.
Then the total resistance in the circuit
R =R1 + R2
Rs = 20 Ω + 4 Ω = 24 Ω.
The total potential difference across the two terminals of the battery
V = 6 V.
Now by Ohm’s law, the current through the circuit is given by
I = V/Rs
= 6 V/24 Ω
= 0.25 A.
Applying Ohm’s law to the electric lamp and conductor separately, we get potential difference across the electric lamp,
V1 = 20 Ω × 0.25 A
= 5 V;
and, that across the conductor, V2 = 4 Ω × 0.25 A
= 1 V.
Suppose that we like to replace the series combination of electric lamp and conductor by a single and equivalent resistor. Its resistance must be such that a potential difference of 6 V across the battery terminals will cause a current of 0.25 A in the circuit. The resistance R of this equivalent resistor would be
R = V/I
= 6 V/ 0.25 A
= 24 Ω.
This is the total resistance of the series circuit; it is equal to the sum of the two resistances.

Aparna-Dasgupta

Likes:
Be first to like this answer

Dislikes:
Be first to dislike this answer
Talk about this|Once you have earned teacher badge you can edit this questionDelete|Like|Dislike|
------------------------------------

Can you help us to add better answer here? Please see this



Not the answer you're looking for? Browse other questions from this Question paper or ask your own question.

Join eduladder!