Welcome to the **Charging And Discharging A Capacitor MDCAT** MCQs with Answers. In this post, we have shared **Charging And Discharging A Capacitor** Multiple Choice Questions and Answers for PMC MDCAT** 2024**. Each question in MDCAT Physics offers a chance to enhance your knowledge regarding **Charging And Discharging A Capacitor** MCQs in this MDCAT Online Test.

## Charging And Discharging A Capacitor MDCAT MCQs Test Preparations

The voltage across a charging capacitor increases:

A) Exponentially

B) Linearly

C) Inversely

D) Logarithmically

The current through a discharging capacitor decreases:

A) Exponentially

B) Linearly

C) Constantly

D) Logarithmically

The voltage across a discharging capacitor after a long time is:

A) Maximum

B) Minimum

C) Zero

D) Equal to the supply voltage

In a capacitor charging circuit, the time constant is:

A) The time required for the voltage to reach 63.2% of the maximum value

B) The time required for the current to become zero

C) The time required for the capacitor to be fully charged

D) The time required for the capacitor to be completely discharged

The current through a capacitor during charging is:

A) Maximum at the start and decreases over time

B) Constant

C) Zero at the start and increases over time

D) Zero throughout

The time required for a capacitor to charge to approximately 99% of its full charge is:

A) 1 time constant

B) 2 time constants

C) 5 time constants

D) 10 time constants

The time constant of an RC circuit determines:

A) The speed of charging and discharging

B) The maximum voltage of the capacitor

C) The resistance of the circuit

D) The capacitance of the capacitor

When a capacitor is fully charged, the current through it is:

A) Zero

B) Maximum

C) Half of the maximum value

D) Constant

During discharging, the rate of decrease of the capacitor’s voltage is:

A) Exponential

B) Linear

C) Constant

D) Logarithmic

During charging, the rate of change of voltage across a capacitor is:

A) Decreasing

B) Constant

C) Increasing

D) Zero

The capacitor’s voltage after one time constant

𝜏

τ during charging is:

A) 37% of the maximum voltage

B) 63% of the maximum voltage

C) 50% of the maximum voltage

D) 90% of the maximum voltage

The time constant of an RC circuit determines how:

A) Fast the capacitor charges or discharges

B) High the voltage can be

C) Large the capacitance is

D) Strong the current is

For a capacitor discharging through a resistor, the charge on the capacitor decreases:

A) Exponentially

B) Linearly

C) Constantly

D) Logarithmically

At the end of one time constant

𝜏

τ during discharging, the capacitor’s voltage is:

A) 37% of its initial value

B) 63% of its initial value

C) 50% of its initial value

D) 90% of its initial value

In a charging capacitor circuit, the rate of change of current is:

A) Exponential

B) Linear

C) Constant

D) Logarithmic

The discharge current of a capacitor through a resistor decreases:

A) Exponentially

B) Linearly

C) Constantly

D) Logarithmically

When a capacitor is connected in series with a resistor and a battery, the capacitor:

A) Charges up to the supply voltage

B) Charges to 37% of the supply voltage

C) Does not charge

D) Discharges immediately

The capacitor’s current during charging is initially:

A) Maximum

B) Zero

C) Constant

D) Minimal

After how many time constants is a capacitor considered fully discharged?

A) 1 time constant

B) 2 time constants

C) 5 time constants

D) 10 time constants

The charging current of a capacitor through a resistor decreases:

A) Exponentially

B) Linearly

C) Constantly

D) Logarithmically

The time constant of a capacitor-resistor circuit is:

A) Directly proportional to both resistance and capacitance

B) Inversely proportional to resistance and capacitance

C) Directly proportional to resistance only

D) Inversely proportional to capacitance only

The rate at which a capacitor charges up depends on:

A) The resistance and capacitance in the circuit

B) The voltage of the capacitor

C) The initial charge of the capacitor

D) The current through the capacitor

After discharging for 5 time constants, the capacitor’s charge is:

A) Almost zero

B) 50% of its initial charge

C) 37% of its initial charge

D) The same as its initial charge

The voltage across a capacitor while discharging:

A) Decreases exponentially

B) Increases exponentially

C) Remains constant

D) Decreases linearly

In a series RC circuit, if the capacitance is doubled, the time constant will:

A) Double

B) Halve

C) Remain unchanged

D) Increase by a factor of four

During discharging, the time constant affects:

A) The rate at which the capacitor discharges

B) The maximum voltage of the capacitor

C) The resistance of the capacitor

D) The capacitance of the capacitor

When a capacitor discharges through a resistor, the voltage drops:

A) Exponentially

B) Linearly

C) Constantly

D) Logarithmically

The charging current of a capacitor is initially:

A) Maximum

B) Zero

C) Constant

D) Minimal

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