Below is a circuit comprised of a battery and two resistors...

Below is a circuit comprised of a battery and two resistors. The ground symbol at the bottom means the bottom wire is selected as the reference point in the circuit of 0 V. (a) Draw lines from the appropriate terminals on the multimeter to where on the circuit they should be connected to measure the voltage at point b. (b) The knob at the top of the battery is its positive terminal. If the battery voltage is Vo, what voltage would be measured at point a?

Transcript

00:01 In the first answer, it is asked that how should we connect two wires to measure the potential at point b.

00:11 Now, potential at point b means the potential between b and the ground.

00:18 And the ground is point c.

00:20 It means we need to find out the potential at point b means potential difference between b and c.

00:27 C is ground.

00:28 So, of course, we will connect c to the com.

00:32 Because com is the ground terminal on the multimeter.

00:35 And we will connect b on voltage obliacom terminal of the multimeter because it is used to measure voltage and the resistance.

00:44 So this is how we will connect.

00:47 This is the answer of part a.

00:50 Now in part b, it is asked what is the voltage at point a.

00:55 Now voltage at point a means potential difference between a and c.

01:01 Right this is potential difference between a and c and potential difference between a and c is nothing but the applied voltage because potential difference between a and c is equal to the potential drop at resistance r1 we can call it vr 1 and plus potential drop at resistance r2 we can call it vr 2 because r1 and r1 and r1 and are in series so potential drop across them will be added so vac will be equal to vr1 plus vr2 and vr1 plus vr2 is ultimately equal to v0 say because it is a battery voltage v0 which is shared among r1 and r2 because they are in series so the sum of the voltages of at drops at r1 and r2 is vo so ve so vasc c equal to v0 now in part c we are asking what is the potential at terminal c so now potential at term means terminal c is the misground so potential at terminal c is zero volts right now secondly part d they ask how much current flows through each resistance now resistance r1 and r2 are in c in series.

02:35 So same current flows through them...

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