WorksheetsCapacitor Charging and discharging
Total questions: 25
Worksheet time: 15mins
If the swithc is thrown to point a. What is observed?
The capacitor is charged
The capacitor is discharged
The resitor is charged
The resistor is discharged
A
B
C
D
A capacitor consists of
Two insulators separated by a conductor
Two conductors separated by an insulator
Two insulators only
Two conductors only
The units of capacitance are
Volts/coulomb
Farad
Coulomb
Ohms
The capacitance of 1 μF equals
10-12 F
10-8 F
10-6 F
10-4 F
The capacitance C is charged through a resistor R. The time constant of the charging circuit is given by
C/R
1/RC
RC
R/C
9. Capacitor is a device used to__________
store electrical energy
vary the resistance
store magnetic energy
dissipate energy
What is the value of capacitance of a capacitor which has a voltage of 4V and has 16C of charge?
2F
4F
6F
8F
Ability of capacitor to store the charge is measured as its
performance
resistance
Capacitance
Durability
Calculate the time constant of a series RC circuit consisting of a 100microF capacitor in series with a 100ohm resistor.
0.1 s
0.1 ms
0.01 s
0.01 ms
Capacitors charge and discharge in __________ manner.
Linear
Constant
Square
Exponential
Which among the following equations is incorrect?
Q=CV
Q=C/V
V=Q/C
C=Q/V
What is the initial current while charging a capacitor?
High
Low
0
Cannot be determined
What is the final current while charging a capacitor?
High
Zero
Infinity
Low
When will be capacitors fully charged
When voltage is zero
When the supply voltage is equal to the capacitor voltage
When voltage is infinity
When capacitor voltage is equal to half the supply voltage
A capacitor is charged to a voltage of 400V and has a resistance of 20ohm. Calculate the final value of the discharge current.
10 A
0 A
Infinity
20A
During discharging a capacitor through a resistor
the current in the circuit increases linearly with time
the current in the circuit decreases linearly with time
the current in the circuit increases exponentially with time
the current in the circuit decreases exponentially with time
Which is the Q vs t graph for the charging process of a capacitor?
a
b
neither
both
Capacitor stores _______________
Charge
Voltage
Energy
Money.. Lots of money
Charge is measured in_________
Coulombs
Farads
Hz
Volts
Which graph best represents the current versus time in the circuit?
A
B
C
D
E
Which of the following is symbol of capacitor ?
The symbol for a battery or power source is _____ (2 answers needed).
Charging capacitor
Equation to calculate the charge in a discharging capacitor
Q=Q0e−RCt
V=V0e−RCt
Q=Q0(1−e−RCt)
V=V0(1−e−RCt)
