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2 năm trước

một bóng đèn có ghi 220V-100W, khi đèn sáng bình thường thì điện năng sử dụng trong 1 giờ là

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thumoc
2 năm trước

Đáp án:

 0,1 KWh

Giải thích các bước giải:

 A=P.t=100.3600=360000 J=0,1 KWh

LSYNBTO
2 năm trước

Tóm tắt:

$U_{dm}=220V$

$\mathscr{P}_{dm}=100W$

$t=1h$

$A=?$

Giải:

Điện năng sử dụng trong 1 giờ là:

   $A=\mathscr{P}_{dm}.t=100.1=100(Wh)=0,1(kW.h)$

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