GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
____ is an electric current that changes direction in a regular pattern.
A
Electric generator
B
Direct current
C
Alternating current
D
Turbine
Explanation: 

Detailed explanation-1: -Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.

Detailed explanation-2: -Alternating Current Explained In alternating current, the electrons don’t move in only one direction. Instead, they hop from atom to atom in one direction for a while, and then turn around and hop from atom to atom in the opposite direction. Every so often, the electrons change direction.

Detailed explanation-3: -An alternating current can be defined as a current that changes its magnitude and polarity at regular intervals of time. It can also be defined as an electrical current that repeatedly changes or reverses its direction opposite to that of Direct Current or DC which always flows in a single direction as shown below.

Detailed explanation-4: -Electric current can be of two types-alternating current and direct current. If the flow of charge is always in the same direction, it is called direct current.

Detailed explanation-5: -In direct current, the voltage is always constant, and the electricity flows in a certain direction. In contrast, in alternating current, the voltage periodically changes from positive to negative and from negative to positive, and the direction of the current also periodically changes accordingly.

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