Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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# Problem P. 4514. (February 2013)

P. 4514. The readings on the voltmeter and the ammeter connected to the circuit shown in the figure are 10 V and 200 mA, respectively when the switch is open. If the switch is closed the reading on the ammeter increases by 0.1 A, and the voltage across resistor R2 increases by 10 V.

a) What are the resistance values of the resistors?

b) What is the voltage of the voltage supply? c) What is the reading on the voltmeter when the switch is closed?

(4 pont)

Deadline expired on March 11, 2013.

Sorry, the solution is available only in Hungarian. Google translation

Megoldásvázlat. $\displaystyle a)$ $\displaystyle R_1=50~\Omega$ és $\displaystyle R_2=100~\Omega$.

$\displaystyle b)$ $\displaystyle U=30$ V.

$\displaystyle c)$ Nullát.

### Statistics:

 85 students sent a solution. 4 points: 68 students. 3 points: 12 students. 2 points: 4 students. 0 point: 1 student.

Problems in Physics of KöMaL, February 2013