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Consider an electric field E = E0 * X, where E0 is a constant. The flux through the shaded area (as shown in the figure) due to this field is - jee main 2012 physics 1 AnswerConsider a disc rotating in the horizontal plane with a constant angular speed about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side a shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) remains constant throughout. Then - jee main 2012 physics 1 AnswerThe electric field intensity of a plane wave traveling in free space is give by the following expression -GATE EC 20151 AnswerAn electron and a proton are moving on straight parallel paths with same velocity. They enter a semi-infinite region of uniform magnetic field perpendicular to be velocity. Which of the following statement(s) is/are true? - jee main 2012 physics 1 AnswerIn the given figure, O is centre of the circle with AC = 24 cm, AB = 7 cm and ∠BOD = 90°. Find the area of the shaded region. Mathematics CBSE class 10 20171 AnswerAn abrupt pn junction (located at x = 0) is uniformly doped on both p and n sides. The width of the depletion region is W and the electric field variation in the x-direction is E(x). Which of the following figures represents the electric field profile near the pn junction?1 AnswerDrift current in the semiconductors depends upon -gate-ece-20111 Answerhow many yards is the perimeter of the field? (GMAT-MATHS)1 AnswerA square coil of 10 cm side and with 100 turns is rotated at a uniform speed of 1000 rpm about an axis at right angles to a uniform field having a flux density of 0.5 T. Calculate the instantaneous value of induced emf when the plane of the coil is (a) at to the field, and (b) in the plane of the field. 1 AnswerIn what orientation is an electric dipole placed in a uniform electric field in stable equilibrium ? (Physics CBSE 2018)1 AnswerIn the given figure, two concentric circles with centre O have radii 21 cm and 42 cm. If ∠AOB = 60°, find the area of the shaded region.Mathematics CBSE class 10 20171 AnswerConsider a uniform plane wave with amplitude E of 10V / m and 1.1GHz frequency travelling in air, and incident normally on a dielectric medium with complex relative permittivity and permeability as shown in the figure.GATE EC 20151 AnswerA 2 micro F capacitor is charged as shown in figure. The percentage of its stored energy dissipated after the switch S is turned to position 2 is jee main 2012 physics 1 AnswerThree semicircles each of diameter 3 cm, a circle of diameter 4.5 cm and a semicircle of radius 4.5 cm are drawn in the given figure. Find the area of the shaded region. Mathematics CBSE class 10 20171 AnswerAn infinitely long hollow conducting cylinder with inner radius R/2 and outer radius R carries a uniform current density along its length. The magnitude of the magnetic field, | B | as a function of the radial distance r from the axis is best represented by - jee main 2012 physics 1 AnswerAn atom in its singlet state is subjected to a magnetic field. The Zeeman splitting of its 650 nm spectral line is 0.03 nm. The magnitude of the field is ________ Tesla (up to two decimal places). ( 𝑒=1.60×10−19 C, 𝑚𝑒=9.11×10−31 kg, 𝑐=3.0×108 ms–1)0 AnswerTwo identical discs of same radius R are rotating about their axes in opposite directions with the same constant angular speed . The discs are in the same horizontal plane. At time t = 0, the points P and Q are facing each other as shown in the figure. The relative speed between the two points P and Q is vr . In one time period (T) of rotation of the discs, vr as a function of time is best represented by - jee main 20121 AnswerA bar magnet of magnetic moment 6 J/T is aligned at 60 degrees with a uniform external magnetic field of 0·44 T. (Physics CBSE 2018)1 AnswerAn electromagnetic plane wave is propagating with an intensity 𝐼=1.0×105 Wm–2 in a medium with 𝜖=3𝜖0 and 𝜇=𝜇0. The amplitude of the electric field inside the medium is ________ ×103 Vm–1 (up to one decimal place). (𝜖0= 8.85×10−12 C2 N–1 m–2, 𝜇0=4𝜋×10−7NA–2, 𝑐 = 3×108 ms–1)0 AnswerWhat is Human Rights Watch? Describe its main contribution to the field of human right-CBSE Class 12 Humanities - Political Science 20161 Answer
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