Prove the following expression. Explain allsymbols: (Ig=km/a)m= #of divisions between 0 and Mk= galvanometer constantIg= current going through galvanometerPart B)Derive Expression: I=((Rg+Rs)/(Rs))IgRg= resistance in galvanometer coilRs= shunt resistancePart C)Prove That if Ig is equal to the current across R1/2 then Rg=R1/2

OneClass: Prove the following expression. Explain allsymbols: (Ig=km/a)m= #of divisions between 0 and...

I have some questions about direct current circuitquestions

1. Three resistors connected in parallel have individual values of67.0, 6.0, and 10.0 ohms, repectively. If this combination isconnected in series with a 12.0V battery and a 2.0ohm resisotr.what is the current in the 10ohm resistor (in A)? (I got 1.15A butthe answer is 0.77A I coudlnt' figure out that why the current is0.77A)

2. Four resistors, R1,R2,R3, and R4, are arrayed as follows in awheatstone bridge circuit between four junction points, a,b,c andd: R1 is between points a and b; R2 is between b and c; R3 isbetween a and d; R4 is between c and d. A galvanometer and switchare connected in series between b and d. This system is connectedin series to a battery at points a and c. When R3=4 ohms and theratio R2/R4=3, the galvanometer reads zero current with the switchclosed. what is thevalue of R1 (in ohms) (the answer is 12.0A)

and if under the condition of zero galvanometer current, withswitch closed, the potenial difference across R4 is 3V, then whatis the voltage across R2(in V)? (answer is 3.0V)

I have some questions about direct current circuitquestions

1. Three resistors connected in parallel have individual values of67.0, 6.0, and 10.0 ohms, repectively. If this combination isconnected in series with a 12.0V battery and a 2.0ohm resisotr.what is the current in the 10ohm resistor (in A)? (I got 1.15A butthe answer is 0.77A I coudlnt' figure out that why the current is0.77A)

2. Four resistors, R1,R2,R3, and R4, are arrayed as follows in awheatstone bridge circuit between four junction points, a,b,c andd: R1 is between points a and b; R2 is between b and c; R3 isbetween a and d; R4 is between c and d. A galvanometer and switchare connected in series between b and d. This system is connectedin series to a battery at points a and c. When R3=4 ohms and theratio R2/R4=3, the galvanometer reads zero current with the switchclosed. what is thevalue of R1 (in ohms) (the answer is 12.0A)

and if under the condition of zero galvanometer current, withswitch closed, the potenial difference across R4 is 3V, then whatis the voltage across R2(in V)? (answer is 3.0V)

A circuit is constructed with five resistors and a battery asshown. The battery voltage is V = 12 V. The values for theresistors are: R1 = 62 O, R2 = 108 O, R3 = 172 O, and R4 = 133 O.The value for RX is unknown, but it is known that I4, the currentthat flows through resistor R4, is zero.

What is V2, the magnitude of the voltage across theresistor R2?

What is I2, the magnitude of the current that flowsthrough the resistor R2?

What is RX, the value of the unknown resistorRX?

What is V1, the magnitude of the voltage across theresistor R1?

If the value of the resistor R2 were doubled, keepingthe values of R1, R4, and RX fixed, how would the value of theresistor R3 have to change in order to keep the current through R4equal to zero?

a. R3 would need to be increased

b. R3 would need to be decreased

c. R3 would not need to be changed

d.There is no change that could be made to R3 to keep thecurrent through R4 equal to zero

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Physics: Principles with Applications

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