There are four light bulbs, which are respectively marked as: (a) "220 V, 60 W" (b) "220 V, 40 W" (c) "220 V, 15 W" (d) "220 V, 100 W." then: (1) the one with the largest resistance is (?) (2) And connected in the lighting circuit, through the current intensity is the largest (?????????) (3) And connected to the lighting circuit, the brightest is (______ (4) in the lighting circuit, the brightest one is (______ 　）

There are four light bulbs, which are respectively marked as: (a) "220 V, 60 W" (b) "220 V, 40 W" (c) "220 V, 15 W" (d) "220 V, 100 W." then: (1) the one with the largest resistance is (?) (2) And connected in the lighting circuit, through the current intensity is the largest (?????????) (3) And connected to the lighting circuit, the brightest is (______ (4) in the lighting circuit, the brightest one is (______ 　）

∵ the rated voltages of the four bulbs are equal, and PD ＞ PA ＞ Pb ＞ PC; ∵ according to r = u2p, RC ＞ RB ＞ RA ＞ Rd, so the resistance of C bulb is the largest; ∵ when the bulbs are in parallel, the voltages at both ends of each bulb are equal; ∵ according to I = ur, ID ＞ IA ＞ IB ＞ IC, so the current intensity of D lamp is the largest; ∵ according to P = u2r, PD ＞ PA ＞ Pb ＞ PC, so D lamp is the brightest; ∵ the current phases at all parts of the series So the answer is: (1) C; (2) d; (3) d; (4) C

There are four light bulbs: A-220 V 40 W, b-220 V 100 W, c-220 V 15 W, d-36 V 40 W. the brightest one is A-220 V 40 W
——————The two that are equally bright are_____
process

Because the basis for judging the brightness of light bulbs is their actual power. When they all light normally, the actual power of light bulbs is equal to their rated power. Therefore, the brightest light bulbs are "220 v-100 W", and the two light bulbs with the same brightness are "220 v-40 W" and "36 v-40 W"

As shown in the figure, the festival lantern is composed of many small bulbs. These small bulbs always flash and go out at the same time. Their connection mode in the circuit is as follows______ ．

Because the rated voltage of each small colored lamp is very small, according to the voltage division function of the series circuit, that is, the sum of the voltages of each part of the series circuit is equal to the total voltage, the small colored lamps can be connected to the circuit in series

Today, there are 28 small color light bulbs connected in series, connected to the 220 V lighting circuit, as festival lights. In use, because the filament of a light bulb burned out, all the small color lights went out. Now I give you a voltmeter, please find out the fault

The voltmeter can be connected in parallel at both ends of each small bulb in turn. When the pointer of the voltmeter deflects and the indication is about equal to the power supply voltage of 220 V, the bulb is the bulb with broken filament