Recent questions tagged electrostatic-potential-and-capacitance

Three charges Q, +q ans +q are placed at vertices of equilateral triangle. If total electric potential energy of system is zero, the value of Q will be :

asked Jan 8, 2014 by meena.p

1 answer

Charges +q and -q are placed on vertices B and C of isosceles triangle. The potential at vertex A is :

asked Jan 8, 2014 by meena.p

1 answer

The capacitors A and B are connected in series with a battery. When S is closed two capacitor gets fully charged , then :

asked Jan 8, 2014 by meena.p

1 answer

An alpha particle is accelerated by a potential difference of $10^7 V$. Its kinetic energy will be

asked Jan 6, 2014 by meena.p

1 answer

A $20 \mu F$ capacitor and $ 40 \; \mu F$ capacitor are connected in series across $400\; V$ supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and negative plates together. No external voltage is applied. What is potential difference across each capacitor .

asked Jan 6, 2014 by meena.p

1 answer

A dielectric slab is introduced just to fill up the space between plates of parallel plate capacitor. The capacitor is charged and then disconnected . The slab is then slowly drown out . The plot of potential difference across the plates and length of dielectric slab drawn out looks like :

asked Jan 6, 2014 by meena.p

1 answer

Choose incorrect statement : When two identical capacitors are charged individually to different potential, and connected to each other after disconnecting them from source .

asked Jan 6, 2014 by meena.p

1 answer

An uncharged capacitor is connected to a battery. On charging the capacitor :

asked Jan 6, 2014 by meena.p

1 answer

The capacitance of parallel plate capacitor does not depend upon

asked Jan 6, 2014 by meena.p

3 answers

Find the equivalent capacitance :

asked Jan 6, 2014 by meena.p

1 answer

Equivalent capacity of parallel plate capacitor shown below is :

asked Jan 6, 2014 by meena.p

1 answer

In the circuit shown below ; if 2000 v potential is given to point A, the potential at point B is :

asked Jan 6, 2014 by meena.p

1 answer

The plates of parallel plate capacitor of capacity $ 100 \mu F$ are charged to potential $100 v $and then seperated from each other so that distance between them is doubled. How much energy is spent in doing so ?

asked Jan 6, 2014 by meena.p

1 answer

A parallel plate capacitor of plate area A, plate seperation d is charged potential difference V. The battery is then removed and a slab of dielectric constant k is inserted between plates of capacitor. If $Q,\in $ and $w$ denotes charge , electric field (after slab is inserted ) and work done on the system in process of inserting the slab, the incorrect relation is :

asked Jan 3, 2014 by meena.p

1 answer

To obtain $6 \mu F $ capacity from $3$ capacitors of $4 \mu F$ each, they will be arranged as :

asked Jan 3, 2014 by meena.p

1 answer

The electric potential as a function of distance x is given by $ V= (-5x ^2-10 x +9) \;volt$ . The electric field at point $(1,2)$ is

asked Jan 3, 2014 by meena.p

1 answer

A $0.4 \mu F$ capacitor is charged to $1200 v. $ After removing battery a $0.2 \mu F$ capacitor is connected in parallel to it. The voltage on capacitor will become :

asked Jan 3, 2014 by meena.p

1 answer

Electric potential at any point is $V=-10 x +6y +\sqrt {60 }z$, then magnitude of electric field is :

asked Jan 3, 2014 by meena.p

1 answer

If capacitor is changed from 0 to 20 v using constant current. Variation in energy U of capacitor with time t will be

asked Jan 3, 2014 by meena.p

1 answer

All the capacitors shown in circuit are identical . Each can withstand maximum $100 V$ between its terminals . The maximum voltage that can be applied safely b/w A and B is

asked Jan 3, 2014 by meena.p

1 answer

Potential of any point inside a charged hollow sphere :

asked Jan 3, 2014 by meena.p

1 answer

n identical condensers are joined in series and are charged to potential v. Now they are seperated and joined in parallel. Total energy and potential difference of combination will be :

asked Jan 3, 2014 by meena.p

1 answer

Angle between lines of force and equi-potential surface is?

asked Dec 20, 2013 by balaji.thirumalai

1 answer

If the space between two plates of a capacitor is filled with liquid of dielectric constant K, the capacitance of the capacitor:

asked Dec 20, 2013 by balaji.thirumalai

1 answer

Radii of two spheres forming a spherical condenser are 0.3 and 0.4m. If dielectric constant of medium is 4 and medium is completely filled in between, find the capacity of the condenser..

asked Dec 20, 2013 by balaji.thirumalai

1 answer

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