ഒരു ദിശയിൽ മാത്രം വൈദ്യുതി കടത്തിവിടുന്ന ഉപകരണം ഏത്?
Aട്രാൻസിസ്റ്റർ
Bകപ്പാസിറ്റർ
Cറെസിസ്റ്റർ
Dഡയോഡ്
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