Recent questions tagged ch2

Three concentric spherical conductors are shown, Find equivalent capacitance b/w A and B

asked Jan 13, 2014 by meena.p

1 answer

A cylindrical layer of homogeneous dielectric with dielectric constant K is introduced in a cylindrical capacitor so that a gap of width d is filled in between them. Radius of plate $R > > d$. If the capacitor is connected to battery of EMF V, the force pulling the dielectric inside the capacitor is :

asked Jan 13, 2014 by meena.p

1 answer

In the circuit given below, the position of switch S is shifted from 1 to 2 . choose the correct statement

asked Jan 10, 2014 by meena.p

1 answer

A thin metal sheet is placed between the plates of a parallel plate capacitor. Its capacitance will

asked Jan 10, 2014 by meena.p

1 answer

Potential difference between points A and B is 5V, then voltage across $2 \mu F$ capacitor is :

asked Jan 10, 2014 by meena.p

1 answer

Three identical metal plates are kept parallel to one another at seperation $d_1\; and\; d_2 $ If both the outer plates are connected to ground and middle plate is given charge q, The charge on right side of middle plate will be :

asked Jan 10, 2014 by meena.p

1 answer

Find the equivalent capacitance between A ans B ,each capacitor having capacitance C.

asked Jan 10, 2014 by meena.p

1 answer

A metal sphere of radius $r_1$ is charged to potential $V_1$ and enclosed in thin spherical shell. If metal sphere is connected to shell by a conductor the potential of shell will be :

asked Jan 8, 2014 by meena.p

1 answer

Capacitors $C1$ and $C2$ are joined as shown below. If potential at point A i $V_A$ and point B is $V_B$, Potential at point C is

asked Jan 8, 2014 by meena.p

1 answer

The capacitance of capacitors of plate area $A_2 and A_1 (A_2 < A_1) $ at a distance l is

asked Jan 8, 2014 by meena.p

1 answer

If electric field $\overrightarrow {E} =( y \hat i + x \hat j ),$ the potential field is

asked Jan 8, 2014 by meena.p

1 answer

Capacitance of capacitor becomes $\large\frac{4}{3}$ times its original value if a dielectric slab of thickness $\large\frac{d}{2}$ is inserted b/w the plates (d= seperation between the plates) . The dielectric constant of the slab is:

asked Jan 8, 2014 by meena.p

1 answer

If two conducting spheres are seperately charged and then brought in contact

asked Jan 8, 2014 by meena.p

1 answer

The electric potential V at any point (x,y,z) in space is given by $V= gx^2\; volt$. Electric field at $ (2,0,5) m $ in $Vm^{-1}$ is :

asked Jan 8, 2014 by meena.p

1 answer

What is effective capacitance between A and B

asked Jan 8, 2014 by meena.p

1 answer

125 drops of water of same radius and same charge combine to form a big drop. Ration of potential of big drop to the potential of small drop.

asked Jan 8, 2014 by meena.p

1 answer

In that below diagram $C_1= 4 \mu F, C_2 =12 \mu F, C_3=8 \mu F$ Energy consumed in charging these capacitors is :

asked Jan 8, 2014 by meena.p

1 answer

A charge Q and another charge q are placed at two points A and B which are distance l apart. Keeping q stationary at B, Q is moved to point C such that ABC forms equilateral triangle of side l. Find the net work done ?

asked Jan 8, 2014 by meena.p

1 answer

A hollow conducting sphere of radius R has a charge $+Q$ as its outer surface. Inside the sphere at $r= \large\frac{R}{4}$ from its centre the value of electric potential will be :

asked Jan 8, 2014 by meena.p

1 answer

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

$8.0575\times 10^{-2}Kg$ of Glauber's salt is dissolved in water to obtain $1dm^3$ of a solution of density 1077.2$Kgm^{-3}$.Calculate the molarity ,molality and mole fraction of $Na_2SO_4$ in solution.

asked Jan 7, 2014 by sreemathi.v

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

A capacitor is charged to $3200 V$ and then connected across a resistor of resistance R. If after 1 s potential difference across capacitor is 2400 V, What will be the potential difference across after 2 and 3 seconds .

asked Jan 6, 2014 by meena.p

1 answer

The range of the function $f(x) = \large\frac{x^2+x+2}{x^2+x+1}$, $x \in (-\infty, \infty)$ is:

asked Jan 6, 2014 by sreemathi.v

1 answer

The capacitance of parallel plate capacitor does not depend upon

asked Jan 6, 2014 by meena.p

3 answers

1. Lichens are symbiotic associations between algae and fungi. 2.The algal component is known as mycobiont and fungal component as phycobiont 3. Algal component is autotrophic and fungal component is heterotrophic 4.Algae absorb water and prepare food for fungi and fungi provide shelter and absorb mineral nutrients for its partner. 5. Lichens are very good pollution indicators – they grow well in polluted areas Regarding 1,2,3,4 and 5:

asked Jan 6, 2014 by pady_1

1 answer

1. In 1979, T.O. Diener discovered a new infectious agent that was smaller than viruses and caused potato spindle tuber disease. 2. It was found to be a free RNA; 3. it lacked the protein coat that is found in viruses, hence the name viroid. 4.The RNA of the viroid was of high molecular weight. Regarding 1,2,3 and 4:

asked Jan 6, 2014 by pady_1

1 answer

Regarding 1,2 and 3: 1. Life cycle of plants has two distinct phases 2. The diploid gametophytic phase and the haploid sporophytic phase - that alternate with each other. 3. This phenomenon is called alternation of generation.

asked Jan 6, 2014 by pady_1

1 answer

In Basidiomycetes: 1.The asexual spores are generally not found 2. Vegetative reproduction by fragmentation is common. 3. The *** organs are present 4. plasmogamy is brought about by fusion of two vegetative or somatic cells of same strain or genotype. 5. The resultant structure of plasmogamy is dikaryotic which ultimately gives rise to basidium. 6.Karyogamy and meiosis take place in the basidium producing four basidiospores. The basidiospores are exogenously produced on the basidium . 7. The basidia are arranged in fruiting bodies called basidiocarps.

asked Jan 6, 2014 by pady_1

1 answer

In Ascomycetes: 1.The asexual spores are conidia produced endogenously on the special mycelium called conidiophores. 2. Conidia on germination produce mycelium. 3. Sexual spores are called ascospores which are produced exogenously in sac like asci 4. These asci are arranged in different types of fruiting bodies called ascocarps.

asked Jan 6, 2014 by pady_1

1 answer

In Phycomycetes: 1. Asexual reproduction takes place by zoospores (non-motile) or by aplanospores (motile). 2. These spores are exogenously produced in sporangium. 3. A zygospore is formed by fusion of two gametes; if these gametes are similar in morphology (isogamous or oogamous) or dissimilar (anisogamous)

asked Jan 6, 2014 by pady_1

1 answer

The sexual cycle involves the following three steps: (i) Fusion of protoplasms between two motile or non-motile gametes called plasmogamy. (ii) Fusion of two nuclei called karyogamy. (iii) Meiosis in zygote resulting in diploid spores. Regarding (i), (ii) and (iii)

asked Jan 6, 2014 by pady_1

1 answer

1. Archaebacteria differ from other bacteria in having a different cell wall structure 2. Methanogens live in marshy areas and halophiles live in hot springs. 3. Methanogens are present in the gut of several ruminant animals

asked Jan 6, 2014 by pady_1

1 answer

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

Habitat of Chlorophyceae -

asked Jan 3, 2014 by pady_1

1 answer

Organisms that are not included in the five kingdom system of classification are:

asked Jan 3, 2014 by pady_1

1 answer

Assertion (A): Infectious free RNA that caused potato spindle tuber disease was named as viroid Reason (R): It was named so because the RNA of the viroid was of low molecular weight.

asked Jan 3, 2014 by pady_1

1 answer

Of the following which is not a viral disease:

asked Jan 3, 2014 by pady_1

1 answer

In plants, the symptoms of viral diseases are:

asked Jan 3, 2014 by pady_1

1 answer

viruses contain:

asked Jan 3, 2014 by pady_1

1 answer

Ask Questions, Get Answers