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If a LC circuit is considered analogous to a harmonically oscillating spring block system, which energy of the LC circuit would be analogous to potential energy and which one analogous to kinetic

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

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A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the

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

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A solenoid 60 cm long and of radius 4.0 cm has 3 layers of windings of 300 turns each. A 2.0 cm long wire of mass 2.5 g lies inside the solenoid (near its centre) normal to its axis; both the wire and the axis of the solenoid are in the horizontal plane. The wire is connected through two leads parallel to the axis of the solenoid to an external battery which supplies a current of 6.0 A in the wire. What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight

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

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Equipotential SurfaceIn physics, the region in space where every point in it is at the same potential, is called equipotential or isopotential. An equipotential region of a scalar potential in three-dimensional space is often an equipotential surface, but it can also be a three-dimensional region in space. The gradient of the scalar potential is everywhere perpendicular to the equipotential surface, and zero inside a three-dimensional equipotential region. In case of electrical conductors, if a and b are any two points within or at the surface of a given conductor, and given there is no flow of charge being exchanged between

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

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The temperature coefficient of resistance of an alloy used for making resistors

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Wheatstone Bridge In 1845 by German physicist Gustav Kirchhoff described Kirchhoff’s circuit laws which are two equalities that deal with the current and potential difference (commonly known as voltage) in the lumped element model of electrical circuits.As an application of these laws, consider the circuit shown below, which is called the Wheatstone bridge. This bridge consists of four resistors `R_1, R_2, R_3 and R_4`. Across one pair of diagonally opposite points (A and C in the figure) a source is connected.This (i.e., AC) is called the battery arm. Between the other two vertices, B and Z), a galvanometer G (which

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

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Induced CurrentThe steady current in the coil `C_2` as shown below produces a steady magnetic field. As coil `C_2` is moved towards the coil `C_1`, the galvanometer shows a deflection. This indicates that electric current is induced in coil `C_1`. When `C_2` is moved away, the galvanometer shows a deflection again, but this time in the opposite direction. This deflection is based upon the Faraday’s law of electromagnetic induction.For duration of deflection in G, i.e. current flow in coil `C_1` which of the following statement is

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

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Find the position, nature,and magnification of the image. An object is placed at 5 cm in front of a concave mirror of radius of curvature 15

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

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You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the

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

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Light of wavelength `2000A^o` falls on an aluminum surface. In aluminum 4.2 eV are required to remove an electron. What is the kinetic energy of (a) fastest (b) the slowest

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

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It is difficult to remove a free electron from copper than from sodium?

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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

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

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An inclined plane making an angle of `30^o` with the horizontal is placed in an uniform electric field `E = 100 Vm^(–1)`. A particle of mass 1 kg and charge 0.01 c is allowed to slide down from rest from a height of 1m. If the coefficient of friction is 0.2 the time taken by the particle to reach the bottom is ..........

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

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A particle having a charge of `1.6xx 10^(-19) C` enters between the plates of a parallel plate capaciter. The initial velocity of the particle is parallel to the plates. A potential difference of 300v is applied to the capacitor plates. If the length of the capacitor plates is 10cm and they are separated by 2cm, Calculate the greatest initial velocity for which the particle will not be able to come out of the plates. The mass of the particle is `12xx 10^(-24) kg`

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

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Three equal masses of m kg each are fixed at the vertices of an equilateral triangle ABC. (a) What is the force acting on a mass 2m placed at the centroid G of the triangle? (b) What is the force if the mass at the vertex A is doubled ? Take AG = BG = CG = 1m (see Fig. )

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

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If 109 electrons move out of a body to another body every second, how much time is required to get a total charge of 1 C on the other

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

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A particle of mass m and charge (–q) enters the region between the two charged plates initially moving along x-axis with speed vx (like particle 1 in Fig. ). The length of plate is L and an uniform electric field E is maintained between the plates. Show that the vertical deflection of the particle at the far edge of the plate is `(qEL^2)/(2m v_x^2)`. Compare this motion with motion of a projectile in gravitational field discussed in Section 4.10 of Class XI Textbook of

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

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A square loop of side 10 cm and resistance `2_Omega` is moved with velocity `v_o` as shown in fig. The uniform magnetic field is 3T with what speed should the loop be moved so that a steady current of 1.5 mA flows in the

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

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The rms value of an ac of 50 Hz is 10 amp.The time taken by the alternating current in reaching from zero to maximum value and the peak value of current will

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

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A coil of inductive reactance `31Omega` has a resistance of `8Omega` . It is placed in series with a condenser of copacitive reactance `25Omega` . The combination is connected to an a.c. source of 110 volt. The power factor of the circuit

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

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