Physics M.C.Q (1 Marks)

Four condensers are joined as shown in the adjoining figure. The capacity of each is 8 μF. The equivalent capacity between the points A and B will be

The capacitor of capacitance 4μF and 6 μF are connected in series. A potential difference of 500 volts applied to the outer plates of the two capacitor system. Then the charge on each capacitor is numerically

n identical condensers are joined in parallel and are charged to potential V. Now they are separated and joined in series. Then the total energy and potential difference of the combination will be

Three capacitors each of capacitance 1μF are connected in parallel. To this combination, a fourth capacitor of capacitance 1μF is connected in series. The resultant capacitance of the system is

Five capacitors of 10 μF capacity each are connected to a d.c. potential of 100 volts as shown in the adjoining figure. The equivalent capacitance between the points A and B will be equal to

The potentials of the two plates of capacitor are +10V and –10 V. The charge on one of the plates is 40 C. The capacitance of the capacitor is

If the distance between the plates of parallel plate capacitor is halved and the dielectric constant of dielectric is doubled, then its capacity will

The capacity of an air condenser is 2.0 mF. If a medium is placed between its plates. The capacity becomes 12 mF. The dielectric constant of the medium will be

A 4 mF condenser is charged to 400 V and then its plates are joined through a resistance. The heat produced in the resistance is

When a lamp is connected in series with capacitor, then

When a dielectric material is introduced between the plates of a charges condenser, then electric field between the plates

On increasing the plate separation of a charged condenser, the energy

An air filled parallel plate capacitor has capacity C. If distance between plates is doubled and it is immersed in a liquid then apacity becomes twice. Dielectric constant of the liquid is

A spherical drop of capacitance 1 mF is broken into eight drops of equal radius. Then, the capacitance of each small drop is ......

A 40 mF capacitor in a defibrillator is charged to 3000 V. The energy stored in the capacitor is sent through the patient during a pulse of duration 2ms. The power delivered to the patient is

If a dielectric substance is introduced between the plates of a charged air-gap capacitor. The energy of the capacitor will

If eight identical drops are joined to form a bigger drop, the potential on bigger as compared to that on smaller drop will be

A charge of 40 μC is given to a capacitor having capacitance C = 10 μF. The stored energy in ergs is

As in figure shown, if a capacitor C is charged by connecting it with resistance R, then energy is given by the battery will be

A parallel plate capacitor carries a charge q. The distance between the plates is doubled by application of a force. The work done by the force is

64 drops of mercury each charged to a potential of 10V. They are combined to form one bigger drop. The potential of this drop will be (Assume all the drops to be spherical)

The unit of electric permittivity is

A 10 micro-farad capacitor is charged to 500 V and then its plates are joined together through a resistance of 10 ohm. The heat produced in the resistance is

Capacitance of a parallel plate capacitor becomes 4/3 times its original value if a dielectric slab of thickness t = d/2 is inserted between the plates (d is the separation between the plates). The dielectric constant of the slab is

A parallel plate air capacitor is charged and then isolated. When a dielectric material is inserted between the plates of the capacitor, then which of the following does not change

A capacitor of capacitance 6μF is charged upto 100 volt. The energy stored in the capacitor is

The capacitance of a parallel plate capacitor is 12μF. If the distance between the plates is doubled and area is halved, then new capacitance will be

The energy required to charge a capacitor of 5μF by connecting a d.c. source of 20 kV is

Capacitance (in F) of a spherical conductor with radius 1m is 

64 small drops of mercury, each of radius r and charge q coalesce to form a big drop. The ratio of the surface density of charge of each small drop with that of the big drop is

A conducting sphere of radius 10cm is charged 10μC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the sphere are separated, then surface density of charges, on the spheres will be in the ratio of

If there are n capacitors in parallel connected to V volt source, then the energy stored is equal to

A thin metal plate P is inserted half way between the plates of a parallel plate capacitor of capacitance C in such a way that it is parallel to the two plates. The capacitance now becomes

Putting a dielectric substance between two plates of condenser, capacity, potential and potential energy respectively

If the distance between parallel plates of a capacitor is halved and dielectric constant is doubled then the capacitance

The electric field between the plates of a parallel plate capacitor when connected to a certain battery I . If the space between the plates of the capacitor is filled by introducing a material of dielectric constant K without disturbing the battery connections, the field between the plates shall be

Work done by an external agent in separating the parallel plate capacitor is

A 10 pF capacitor is connected to a 50 V battery. How much electrostatic energy is stored in the capacitor

A parallel plate air capacitor is charged to a potential difference of V. After disconnecting the battery, distance between the plates of the capacitor is increased using an insulating handle. As a result, the potential difference between the plates

The mean electric energy density between the plates of a charged capacitor is (here q = charge on the capacitor and A = area of the capacitor plate)