General Science/Basic Science Capacitor Sample Test,Sample questions

Question:
.The electric field intensity in between the parallel plates of a capacitor is

1.?/2?o

2.Q/2A?o

3.V/d

4.Vd


Question:
1 pF is equal to

1.10-6 F

2.10-12 F

3.10-3 F

4.10-9 F


Question:
Capacitor stores

1.magnetic energy

2.chemical energy

3.electrical energy

4.heat energy


Question:
Electrical charges can be stored in

1.transformers

2.capacitors

3.inductors

4.resistors


Question:
If a negatively charged conductor is brought near a positively charged conductor  its potential

1.increases

2.decreases

3.remains the same

4.becomes zero


Question:
In parallel combination of capacitors

1.charges on the capacitors are same

2.potential difference across each capacitor is same

3.current on the capacitors is same

4.both charges end potentials are same


Question:
One microfarad is equal to

1.10-5 F

2.10-3 F

3.10-9 F

4.10-6 F


Question:
Pick out the correct formula connecting capacity C voltage V and the charge Q

1.C = V/Q

2.C = Q/V

3.C = VQ

4.C = QV


Question:
The area of each plate of a parallel plate capacitor is 4 ? 10-2m2. If the thickness of the dielectric placed in between the plates is 10-3 and the relative permittivity of the dielectric is 7 then the capacitance of the capacitor

1.2.478 ? 10-9F

2.0.2478 ? 10-9F

3.2.478 ? 10+9F

4.2.478 F


Question:
The capacitance of a capacitor when the distance between the two plates is doubled

1.reduce to zero

2.is doubled

3.remains the same

4.is halved


Question:
The capacitance of a parallel plate capacitor is

1.A?r/d

2.Ad/ ?o ?r

3.A ?o ?r/d

4.d/ A ?o ?r


Question:
The capacitance of a parallel plate capacitor is 2�F.If the surface area of the palte is doubled and the distance between the plates is halved what will be the capacitance of the condensor

1.6 �F

2.2 �F

3.8 �F

4.1 �F


Question:
The charge that can be stored in a 50�F capacitor connected to a source of potential difference of 20V is

1.1 �C

2.10-3 C

3.1 C

4.1000 C


Question:
The dielectric inside a capacitor basically increases

1.voltage rating

2.current rating

3.capacitance

4.power rating


Question:
The potential difference between the plates of a 20�F capacitor with a charge of 0.01 coulomb is

1.2 ? 10-7 volts

2.2 ? 10-5 volts

3.50 volts

4.500 volts


Question:
The ratio of the charge to potential is

1.resistance

2.current

3.temperature co-efficient of resistance

4.capacitance


Question:
The unit of capacitance is

1.coulomb

2.joule

3.volt

4.farad


Question:
Two capacitors of capacitance 10�F and 40�F when connected in series will yield an equivalent capacitance of

1.50 �F

2.25 �F

3.8 �F

4.30 �F


Question:
When a glass is introduced in between the plates of a parallel plate air condenser its capacitance will

1.not charge

2.decrease

3.increase

4.tend to zero


Question:
When the charging source is disconnected the charges given to the plates of an ideal capacitor

1.increases

2.decreases

3.becomes zero

4.remains the same


Question:
When two capacitors of capacitances 2 pF and 6 pF connected in parallel the effective capacitance is

1.8 pF

2.12 pF

3.3/2 pF

4.4 pF


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