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Calculate the(a) momentum, (b) de Broglie wavelength of the electrons accelerated through a potential difference of

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

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Assume that the frequency of the radiation incident on a metal plate is greater than its threshold frequency. How will the following change, if the incident radiation is doubled?(1) Kinetic energy of electrons (2) Photoelectric

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

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Two point electric charges of value q and 2q are kept at a distance d apart from each other in air. A third charge Q is to be kept along the same line in such a way that the net force acting on q and 2q is zero. Calculate the position of charge Q in terms of q and

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

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Two Points P and Q are maintained at the Potentials of 10 v and –4 v, respectively. Thework done in moving 100 electrons from P to Q is

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

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Three identical charges each of 2µc are placed at the vertices of a triangle ABC as shown in the figure. If AB + AC = 12 cm and AB . AC = `32cm^2` , the potential energy of the charge at A is

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

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E, m, l and G denote energy, mass, angular momentum and gravitational constant respectively. Determine the dimensions of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The angle θ covered by a body in rotational motion is give by the equation `θ = 6t + 5t^2 + 2t^3`. Determine the value of instantaneous angular velocity and angular acceleration at time `t =

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Weather the following is periodic or not?

asked Mar 20, 2022 in 11th Physics by varun (6.7k points)

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Fig . shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass

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

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Which among the curves shown in Fig. cannot possibly represent electrostatic field lines?

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

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It is now believed that protons and neutrons (which constitute nuclei of ordinary matter) are themselves built out of more elementary units called quarks. A proton and a neutron consist of three quarks each. Two types of quarks, the so called ‘up’ quark (denoted by u) of charge + (2/3) e, and the ‘down’ quark (denoted by d) of charge (–1/3) e, together with electrons build up ordinary matter. (Quarks of other types have also been found which give rise to different unusual varieties of matter.) Suggest a possible quark composition of a proton and

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

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Fig. shows electric field lines in which an electric dipole p is placed as shown. Which of the following statements is

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

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Five charges, q each are placed at the corners of a regular pentagon of side ‘a’ (Fig.).

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A circular coil expands radially in a region of magnetic field and no electromotive force is produced in the coil. This can be

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

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A rectangular loop of wire ABCD is kept close to an infinitely long wire carrying a current` I (t ) = I_o (1 – t /T ) `for 0 ≤ t ≤ T and `I (0) = 0 'for' t > T` (Fig. ). Find the total charge passing through a given point in the loop, in time T. The resistance of the loop is R.

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

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When a voltage measuring device is connected to AC mains, the meter shows the steady input voltage of 220V. This

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

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Draw the effective equivalent circuit of the circuit shown in Fig , at very high frequencies and find the effective

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The self inductance of a straight conductor

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

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A square loop of side 5 cm being moved right at a constant speed `2cms^(-1)` .The front edge of it enters in magnetic field at t = 0.Fined the induced emf in the loop at t = 1s, 5s,

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

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If rotational velocity of a dynamo armature is doubled, then induced emf will become...What is increased in step down transformer

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

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