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Why capacitors dont allow dc current?

Posted by Chitra Rawat 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Dhanjeet Chahal 7 years, 4 months ago

Becoz frequency of capacitor is zero so resiatance of cpacitor becomes infinite so it does not allow dc current to flow though it.

ANSWER

Determine the rms current?

Posted by Shibbu Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

If two structures of same cross sectional area, but different numerical apertures NA1 and NA2 are joined longitudinally, the nnumeric aperture of combined structure is ?

Posted by Shadan Khan 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

is momentum a vector quantity

Posted by Sarfaraz Khan 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Sakshi Singh 7 years, 4 months ago

Momentum is a vector quantity because it is multiplied by velocity which is vector. Momentum has a specific direction.

Shadan Khan 7 years, 4 months ago

Yes

ANSWER

Which r the chapters NP(numerical problems) can be taken for annual exams

Posted by Umakanth N 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Shadan Khan 7 years, 4 months ago

Electrostatic Ac Atom &, nuclie

ANSWER

Prism having refractive index 'n' is kept in air. find the maximum value of angle of incidence for total internal reflection to occur

Posted by Anjali Arya 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A length of wire carries a steady current,is bent first to form a plane circular coil of one turn, same length now bent more sharply to give three turns of smaller radius. Magnetic field becomes.........

Posted by Deepika Sharma 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Deepika Sharma 7 years, 4 months ago

Ans plz?

ANSWER

Derivation of electric field due to point charge with diagram

Posted by Rashi Rawat 7 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Rashi Rawat 7 years, 4 months ago

Thnku

Nitish Sharma 7 years, 4 months ago

U should Search it On google "Rashi" because derivations r too big and Diagrams cannot be send here

Anshika Choudhary 7 years, 4 months ago

Diagram is not possible here sorry

ANSWER

class12 previous year question paper

Posted by Johnson Toppo 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Rashi Rawat 7 years, 4 months ago

In google u find it?

ANSWER

Tell me about magnetic elemets of earth

Posted by Kavita Sharma 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What i must do to get 100/100 in these both subjects with any xrta overload

Posted by Aj Styles 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Eguipotential surface

Posted by Aman Yadav 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Himanshu Sharma 7 years, 4 months ago

A surface at potential at every point is same

Aman Yadav 7 years, 4 months ago

A surface on which potential at every point is same

ANSWER

What is compass

Posted by Varun Das 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Calculate the current in a circular coil of radius 5cm and 100 turn to produce a field of 2×10^5 t at its center

Posted by Pawan Kumar 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Calculate

Posted by Pawan Kumar 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

?Which mode of propagation is used by shortwave broadcast services (CBSE 2018)???✍

Posted by Yo Yo Honey Singh ? 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Name the electromagnetic radiation used for (a) water purification and (b) eye surgery.

Posted by Yo Yo Honey Singh ? 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The power factor of an AC circuit is 1 what will be the phase difference between voltage and current in the circuit

Posted by Usam Devi 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Integral of tan x

Posted by Atul Dwivedi 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Manan Bedi 7 years, 4 months ago

Log |sec x| or -log|cos x| Sec square x is its derivative

Siva Dasan 7 years, 4 months ago

Sec square x

ANSWER

where is the effective power

Posted by Ankit Roy 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Ankit Roy 7 years, 4 months ago

not a single type of answer is given

ANSWER

What is the work done in moving a 2 microcoulomb point charge from corner A to corner B of a square ABCD when a 10 micro coulumb charge exist at the center of the square

Posted by Aishwarya Bhardwaj 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

reading of experiment 1 in physics practical file

Posted by Raghvendra Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

important deriviation of all chapter in part 1st

Posted by Vijay Singh Koshyari 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Vini Phogat 7 years, 4 months ago

AC GENERATOR , MOVING GALVANOMITER , LCR

ANSWER

What is the impidence for ideal conducter in dc source

Posted by Vini Phogat 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

use of hair spring in galvanometer?

Posted by Sneha Kushwaha 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Himanshu Yadav 7 years, 4 months ago

It is used to bring the pointer zero in electric fi

ANSWER

How is current density ( j ) vector

Posted by Yash Jaiswal 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What do you mean by " charge is always associate with mass "?

Posted by Pankaj Kumar 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Aj Style 7 years, 4 months ago

Charge, q=ne where n is no. of electrons & e is charge on an electrons (e- contain some mass )ie:charge is associated with mass

ANSWER

If temperature of a conductor is decreased, does its resistivity also decreased???

Posted by Tamoghna Roy 5 years, 8 months ago

CBSE > Class 12 > Physics

3 answers

Himanshu Baranwal 7 years, 4 months ago

Because if temperature increases then the collision between two ions or molecules increases due to its kinetic energy. So current flow very fastly in the conductor. Then resistivity decreases. It is the reason. OK.

Tamoghna Roy 7 years, 4 months ago

But, in Dinesh New Millennium Physics-Class Xii, it is written that if temp. is decreased, then resistivity also decreases... ?

Himanshu Baranwal 7 years, 4 months ago

Temperature is inversely proportional to resistivity for conductor. So,temperature decreased then resistivity increased.

ANSWER

A solenoid of length 1.0m has a radius of 1cm and has a total of 1000 turns wound on it . It carries a currrnt of 5A . Calculate the magnetic of axial magnetic field inside the solenoid . If an electron was to move with a speed of 10^4 m^-1 along thw axis of this current carrying solenoid , what would be then force experience by this electron ?

Posted by Ravindra Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A coil of N turns and radius R carries a current I. It is unwound and rewound to make a square coil having same number of turns N . Keeping the current I same , find the ratio of magnetic moments of the squaŕe coil and the circular coil .

Posted by Ravindra Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

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