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2017年兰州市中考物理试?- 百度文库

Դû ʱ䣺2025/7/11 23:09:05 loading ƪĵֻ
˵ݽԤݿܲȫҪĵҪݣwordʹáword΢ź:xxxxxxxQQxxxxxx ܸṩĵл֧½⡣

I=ɵãԴĵѹ U=IR1=0.5A20=10V

2ƬλҶʱ·еĵ󣬵·еĵ ʱ·еĵСIС=0.1A ·еܵ裺 R=

=

=100

·ܵڸֵ֮ͣ ԣR2ֵ R2=RR1=10020=80 3·еĵ I=

ĵĵ繦ʣ P2=I2R2=

2

R2=

==

=

R2=R1=20ʱĵĵ繦 P2=

=

=1.25W

𣺣1ԴѹΪ10V

2R2ֵΪ80

3ͨ˵·ĵΪ20ʱĵĹΪ1.25W

⿼˴·صŷķɡ繦ʹʽӦãȷжϻĵĵ繦ǹؼ

41ҳ41ҳ

2017年兰州市中考物理试?- 百度文库.doc ĵWordĵصԣ㸴ơ༭ղغʹӡ
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