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1
椤碉紝鍏?/p>
6
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娌欏幙閲戞矙楂樼骇涓
2017-2018
瀛﹀勾绗簩瀛︽湡鏈熶腑璇曞嵎
楂樹簩鐗╃悊
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鑰冭瘯鏃堕棿锛?/p>
120
鍒嗛挓
鎬诲垎
100
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瀛︽牎
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鐝骇锛?/p>
___________
鑰冨彿锛?/p>
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涓�銆佸崟閫夐锛堟湰澶ч鍏?/p>
10
灏忛锛屽叡
30.0
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1.
鍥句腑鑳戒骇鐢熸劅搴旂數娴佺殑鏄紙
锛?/p>
A.
B.
C.
D.
2.
浼犳劅鍣ㄥ凡骞挎硾搴旂敤鍦ㄧ敓浜с�佺敓娲讳腑锛屼笅鍒楀叧浜庝紶鎰熷櫒鐨勮娉曟纭殑鏄紙
锛?/p>
A.
鐏鎶ヨ鍣ㄤ娇鐢ㄤ簡鍘嬪姏浼犳劅鍣?/p>
B.
鍐扮鎺ф俯绯荤粺浣跨敤浜嗘俯搴︿紶鎰熷櫒
C.
鍟嗗満閲岀殑鑷姩闂ㄤ娇鐢ㄤ簡鍏変紶鎰熷櫒
D.
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3.
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d
锛屼竴绔法鎺ヤ竴涓數闃?/p>
R
锛屽寑寮虹鍦虹殑纾?/p>
鎰熷簲寮哄害涓?/p>
B
锛庢柟鍚戝瀭鐩翠簬骞宠閲戝睘瀵艰建鎵�鍦ㄥ钩闈紟涓�鏍归噾灞炴涓庡
杞ㄦ垚
胃
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蠀
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R
鐨勭數娴佹槸锛?/p>
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A.
B.
C.
D.
4.
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n
1
=1100
鍖濓紝鍓嚎鍦堝対鏁?/p>
n
2
=220
鍖濓紝
浜ゆ祦鐢垫簮鐨勭數鍘?/p>
u
=220
sin
120蟺
t
锛?/p>
V
锛?/p>
锛?/p>
鐢甸樆
R
=50惟
锛?/p>
鐢靛帇琛ㄣ�佺數娴佽〃鍧囦负鐞嗘兂鐢佃〃锛屽垯锛?/p>
锛?/p>
A.
浜ゆ祦鐢电殑棰戠巼涓?/p>
50
Hz
B.
V
鐨勭ず鏁扮害涓?/p>
44
V
C.
A
2
鐨勭ず鏁扮害涓?/p>
1.4
A
D.
A
1
鐨勭ず鏁扮害涓?/p>
0.1
A
5.
濡傚浘鎵�绀猴紝涓夊彧瀹屽叏鐩稿悓鐨勭伅娉?/p>
A
銆?/p>
B
銆?/p>
C
鍒嗗埆涓庣數瀹瑰櫒銆佺數鎰熺嚎鍦?/p>
鍜岀數闃讳覆鑱斿悗鎺ュ湪鍚屼竴浜ゆ祦鐢垫簮涓婏紝渚涚數鐢靛帇鐬椂鍊间负
u
1
=
U
m
sin蠅
1
t
锛?/p>
姝ゆ椂涓夊彧鐏场浜害鐩稿悓锛庣幇鎹㈠彟涓�涓數婧愪緵鐢碉紝渚涚數鐢靛帇鐬椂鍊间负
u
2
=
U
m
sin蠅
2
t
锛?/p>
蠅
2
=2蠅
1
锛庡垯鏀规崲鐢垫簮鍚庯紙
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