Question
26.18 in Fig. E26.7 find the reading of the Figure 126.7 idealized ammeter if the battery has an 430 n iggekual resistance of 3.26 n 6.8 Three resistors having resis 25.0 V of 1.60 n, 2.40 n, and 4.80 n are connected in parallel to a 28.0-V bat- uery that has negligible internal rcsis. tance, Find (a) the equivalent resistance 5.0n of the combination; (b) the current in each resistor; (c) the total current through the battery; (d) the volt. age across each resistor (c) the power dissipated in each resistor. 3/2/2017 ton 198, na 82 31 aum ized to uso unta 13 2020 urc beyond the authonzo user ub senpt date represents a copy sht vici t on
Explanation / Answer
Resistors in parallel
R=1/(1/R1 + 1/R2 +1/R3)
1/(1/1.6+1/2.4+1/4.8)=4/5=0.8 Ohm
According toOhm's law I=V/R
For V=28 and R=1.6
I=28/1.6=17.5A
the total current
in the circuit is 28/0.8 = 35 A