Question

18. Figure 4.E5 shows a part of an electric circuit. The
reading of the ammeter is 3.0 A. Find the currents
through the 10-12 and 20-22 resistors.
10 22
A
2012
Fig. 4.E5​

Answer 1

Correct question :

shows a part of an electric circuit. The reading of the ammeter is 3.0 A. Find the currents through the 10 ohm and 20 ohm resistors.

Solution :

let the 10 ohm resistor x R_1 and 20 ohm resistor R_2

let the current in 10 ohm

resistor be 11 and current in 20 ohm resistor be in reading of ammeter be 1

1 = 3.0 ohm

11 = IR_20 /(R_1 + R_2)

= 30 x 20/(10 + 20)

= 60/30

= 2A

current flowing through R_1 is 2 amp

2 = 1R_1/(R_1 + R_2)

= 3 x 10 /(10 + 20)

= 30/30

= 1 amp

=> Current flowing through R_2 is 1 amp

Answer 2

answer

IS

CURRENT FLOWING THROUGH

R_2 IS 1 AMP