Resistors!

Electricity and Magnetism Level 1

In the figure above, two resistors R 1 = 36.0 Ω R_1= 36.0\ \Omega and R 2 = 18.0 Ω R_2=18.0\ \Omega are connected in series across a 15.0 V 15.0\text{ V} battery.

What is the total voltage across the two resistors?

36 18 54 15

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Mardokay Mosazghi by Mardokay Mosazghi , 22, USA

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5 solutions

Discussions for this problem are now closed

Ameya Salankar
Apr 22, 2014

No need to do all those calculations. The sum of all the voltages across all the resistors connected in series is the main voltage itself!

⇒ \Rightarrow The answer is 15 \boxed{15} !

53 Helpful 0 Interesting 0 Brilliant 0 Confused

LOL! Right obviously!

Vaishnavi Gupta - 7 years, 1 month ago
Keerthi Vasan Srs
May 28, 2014

It's simple. From Kirchoff's law it can be proved that voltage across resistors connected in series is equal to the voltage applied! Hence, the answer is 15V!

3 Helpful 0 Interesting 0 Brilliant 0 Confused
Karishma Mahanta
Apr 28, 2014

The overall voltage=The main voltage in the battery Therefore,15V is the overall voltage.

3 Helpful 0 Interesting 0 Brilliant 0 Confused
Vida Joy Montero
May 27, 2014

when two resistors are connected in series, the total voltage across all resistors is the battery voltage.

2 Helpful 0 Interesting 0 Brilliant 0 Confused
Jay Mundra
May 21, 2014

total voltage will not change in series combination

2 Helpful 0 Interesting 0 Brilliant 0 Confused

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