Hot questions

0 votes

0 answers

An electron and a photon each have a wavelength of 1.00 nm. Find their

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

0 votes

0 answers

Estimating the following two numbers should be interesting. The first number will tell you why radio engineers do not need to worry much about photons! The second number tells you why our eye can never ‘count photons’, even in barely detectable light. The number of photons emitted per second

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

0 votes

0 answers

A mercury lamp is a convenient source for studying frequency dependence of photoelectric emission, since it gives a number of spectral lines ranging from the UV to the red end of the visible spectrum. In our experiment with rubidium photo-cell, the following lines from a mercury source were used: λ1 = 3650 Å, λ2 = 4047 Å, λ3 = 4358 Å, λ4 = 5461 Å, λ5 = 6907 Å, The stopping voltages, respectively, were measured to be: `V_01` = 1.28 V,`V_02` = 0.95 V, `V_03` = 0.74 V, `V_04` = 0.16 V, `V_05` = 0 V Determine the value of

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

0 votes

0 answers

An electron is moving with an initial velocity ` v = v_0hat i` and is in a magnetic field 0 `B=B_ 0hatj`. Then it’s de Broglie

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

0 votes

0 answers

Two particles A1 sand A2 of masses m1, m2 (m1 > m2) have the same de Broglie wavelength.

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

0 votes

0 answers

The de Broglie wavelength of a photon is twice the de Broglie wavelength of an electron. The speed of the electron is `V_e=c/100`.

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

0 votes

0 answers

A proton and an α-particle are accelerated, using the same potential difference. How are the deBroglie wavelengths λp and λa related to each

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

0 votes

0 answers

Two particles A and B of de Broglie wavelengths λ1 and λ2 combine to form a particle C. The process conserves momentum. Find the de Broglie wavelength of the particle C. (The motion is one

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

0 votes

0 answers

Consider a 20 W bulb emitting light of wavelength 5000 A ° and shining on a metal surface kept at a distance 2m. Assume that the metal surface has work function of 2 eV and that each atom on the metal surface can be treated as a circular disk of radius 1.5 A ° .

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

0 votes

0 answers

If the amount of electric flux entering and leaving a closed surface are `phi_1` and `phi_2` respectively. What is the electric charge inside the

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

0 votes

0 answers

A semi-circular arc of radius ‘a’ is charged uniformly and the charge per unit length is A. The electric field at the centre of this arc

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

0 votes

0 answers

Given a cube with point charges q on each of its vertices. Calculate the force exerted on any of the charges due to rest of the 7

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

0 votes

0 answers

Calculate the electric field intensity E which would be just sufficient to balance the weight of an electron. If this electric field is produced by a second electron located below the first one what would be the distance between them? [Given : `e=1.6 × 10^(-19) C, m = 9.1 × 10^(–31) kg and g = 9.8

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

0 votes

0 answers

If an isolated infinite sheet contains charge `Q_1` on its one surface and charge `Q_2` on its other surface then prove that electric field intensity at a point in front of sheet will be `Q/(2Aepsilon_0)`, where `Q=

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

0 votes

0 answers

Three charges, each of value Q, are placed at the vertex of an equilateral triangle. A fourth charge q is placed at the centre of the triangle. If the charges remains stationery then, q =

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

0 votes

0 answers

For the system shown in figure, if the resultant force on q is zero, then Q =

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

0 votes

0 answers

At what angle θ a point P must be located from dipole axis so that the electric fieldintensity at the point is perpendicular to the dipole axis

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

0 votes

0 answers

A long string with a charge of `lambda` per unit length passes through an imaginary cube of edge `l`. The maximum possible flux of the electric field through the cube will be

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

0 votes

0 answers

Charges of `+ 10/3xx10^(-19) C` are placed at each of the four corners of a square of side 8cm. The potential at the intersection of the diagonals is

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

0 votes

0 answers

The electric Potential at a point P (x, y, z) is given by `V = –x^2y – xz^3 + 4` The electric field `vecE` at that point is

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

Hot questions

Categories