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A circular loop of radius R carrying current I lies in X-Y plane with its centre at origin. The total magnetic flux through x-y plane

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Pure inductance of 3H each are connected as shown below. The equivalent inductance of the circuit

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Two identical incandesant light bulbs are connected as shown in figure. when the circuit is an AC voltage source of frequency f, which of the following observations will be

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A straight wire of mass 200 gm and length 1.5 meter carries a current of 2 Amp. It is suspended in mid-air by a uniform horizontal magnetic field B. [take g = 10 m/`s^2` ]. The B is

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Graph of force per unit length between two long parallel current carrying conductors and the distance between them is

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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

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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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A compound microscope consists of an objective lens of focal length 2.0cm and an eyepiece of focal length 6.25cm separated by a distance of 15cm. How far from the objective should an object be placed in order to obtain the final image at at infinity? What is the magnifying

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Use the mirror equation to deduce that: an object placed between f and 2f of a concave mirror produces a real image beyond

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The direction of ray of light incident on a concave mirror is shown by PQ while directions in which the ray would travel after reflection is shown by four rays marked 1, 2, 3 and 4 (Fig ). Which of the four rays correctly shows the direction of reflected

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A myopic adult has a far point at 0.1 m. His power of accomodation is 4 diopters. What power lenses are required to see distant

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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

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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 ..........

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The numbers `5.355 and 5.345` on rounding off to 3 significant figures will

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By how many ways we can charge a body?

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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

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If `oint_0^1 vec E cdot vec (ds)=0` over a surface,

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In the figure the magnetic energy stored in the coil

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

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Faraday Cage A Faraday cage or Faraday shield is an enclosure made of a conducting material. The fields within a conductor cancel out with any external fields, so the electric field within the enclosure is zero.These Faraday cages act as big hollow conductors. You can put things to shield them from electrical fields. Any electrical shocks the cage receives, pass harmlessly around the outside of the cage. What is the electrical force inside a Faraday cage, when it is struck by

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The potential of an electric dipole varies with distance `r`

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

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