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State Three Differences Between Direct Current and Alternating Current. - Science and Technology 1

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State three differences between direct current and alternating current.

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Solution

  Direct current   Alternating current
1 Direct current flows only in one direction. 1 Alternating current reverses its direction periodically with time.
2 It cannot be used in large-scale generation of electricity for household purposes. 2 It is used in household electrical appliances such as electric heater, electric iron, refrigerator etc.
3 The frequency of direct current is zero. 3 The frequency of alternating current in India is 50 Hz.

 

Concept: Electromagnetic Induction
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