[填空题]
Consider the network of resistors shown dk*9qryznzc c 7:)nhx3 eab3 6in (Fig. *a; +.fffos)gx 4ycgb Below). Answer qualitatively:
).+co *f gs4aby; xgff (a) What happens to the voltage across each resistor when the switch S is closed? $V_1$ $V_2$ $V_3$ $V_4$
(b) What happens to the current through each when the switch is closed? $V_1$ $V_2$ $V_3$ $V_4$
(c) What happens to the power output of the battery when the switch is closed?
(d) Let $R_1=R_2=R_3=R_4=125\Omega$ and $V\,=\,22.0\,V$. Determine the current through each resistor before and after closing the switch. Are your qualitative predictions confirmed? Notice that the current through each of the parallel resistors is half of the total current, within the limits of significant figures. $I_1$ A $I_3$ A $I_4$ A Notice that the current through each of the parallel resistors is one third of the total current, within the limits of significant figures.$I_1$ A $I_2$ A $I_3$ A $I_4$ A
