如图,某理想变压器的原副线圈的匝数均可调节,原线圈两端电压

 如图,某理想变压器的原副线圈的匝数均可调节,原线圈两端电压为一峰值不变的正弦交变电压,在其他条件不变的情况下,为使变压器输入功率增大,可使(     )

 A.原线圈匝数n1增加

B.副线圈匝数n2增加

C.负载电阻R阻值增大

 D.负载电阻R阻值减小

 

答案

 BD

 

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