In constant-current charging method, the supply voltage from discharged to fully charged condition

decreases
increases
remains constant
none of the above

The correct answer is C. remains constant.

In constant-current charging, the charging current is kept constant until the battery reaches a certain voltage, called the cut-off voltage. At this point, the charging current is reduced to a trickle charge to maintain the battery’s charge.

The supply voltage in a constant-current charging method remains constant throughout the charging process. This is because the charging current is kept constant, and the voltage across a resistor is proportional

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to the current flowing through it.

Option A is incorrect because the supply voltage does not decrease throughout the charging process. Option B is incorrect because the supply voltage does not increase throughout the charging process. Option D is incorrect because the supply voltage does not change throughout the charging process.

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