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An electron and an alpha particle have the same debroglie wavelength associated with them? How are their kinetic energies related to each

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An α − particle and a proton are accelerated from rest through same potential difference V. find the ratio of de–broglie wavelength associated with

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Photoelectric work function of a metal is 1eV. Light of wavelength `3000A^o` falls on it. What is the velocity of the effected

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The wavelength λ of a photon and debroglie wavelength of an electron have the same value. Show that the energy of the photon is `(2mcλ)/h` times the kinetic energy of electron where m, c, and h have their usual

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Draw a graph showing the variation of stopping potential with frequency of the incident radiations. What does the slope of the line with the frequency axis indicate. Hence define threshold

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Show does the force between two point charges change if the dielectric constant of the medium in which they are kept

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A charged rod P attracts rod R where as P repels another charged rod Q. What type of force is developed between Q and

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A free proton and a free electron are placed in a uniform field. Which of the two experience greater force and greater

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No two electric lines of force can intersect each other?

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A particle of mass m and charge q is released form rest in a uniform electric field of intensity E. calculate the kinetic energy it attains after moving a distance s between the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two point charges +q and +9q are separated by a distance of 10 a. Find the point on the line joining the two changes where electric field is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Define the term dipole moment `vecP` of an electric dipole indicating its direction. Write its S.I unit. An electric dipole is placed in a uniform electric field `vecE` . Deduce the expression for the Torque acting on

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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(1) The electric field `vecE` due to a point change at any point near to it is defined as: `vecE=Lim vecF/q`where q is the test charge and `vecF` is the force acting on it. What is the significance of lim `qtoo` in this expression?(2) Two charges each `2 xx 10^(-7)` C but opposite in sign forms a system. These charges are located at points A (0,0, -10) cm and B(0,0, +10) cm respectively. What is the total charge and electric dipole moment of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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(a) Sketch electric lines of force due to (i) isolated positive change (ie q>0) and(ii) isolated negative change ( ie q(b) Two point changes q and –q are placed at a distance 2a apart. Calculate the electric field at a point P situated at a distance r along the perpendicular bisector of the line joining the charges. What is the field when r >>

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Which physical quantity has its S.I unit (1) Cm (2)

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Define one

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The graph shows the variation of voltage V across the plates of two capacitors A and B versus increase of charge Q stored on them. Which of the two capacitors have higher capacitance? Give reason for your answer?

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electric dipole when held at `30^0` with respect to a uniform electric field of `10^4 N/C` experienced a Torque of `9 x 10^(-26) Nm`. Calculate dipole moment of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A sphere of radius `r_1` encloses a change Q. If there is another concentric sphere S2 of radius `r_2 (r_2 > r_1)` and there is no additional change between S1 and S2. Find the ratio of electric flux through S1 and

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Electric charge is uniformly distributed on the surface of a spherical balloon. Show how electric intensity and electric potential vary (a) on the surface (b) inside and (c)

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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