Which is a source of direct current (dc)? a) generator b) wall socket c) electromagnetic induction d) chemical cells or batteries

D) chemical cells or batteries

Explanation: Direct Current is an electric current in which electrons flow steadily in a single direction. Alternating Current is an electric current that periodically reverses its direction.

As alternating current can be converted to voltage levels with a single component using a transformer, and thus are used to transmit electricity over long distances.

A) Generators use electromagnetic induction to convert mechanical energy into electrical energy and produce alternating current.

B) Wall sockets are a source of alternating current.

C) Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field and produce alternating current.

D) Batteries convert chemical energy into electrical energy by a chemical reaction and produce direct current.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.