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

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Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude 17.0 × 10–22 C/`m^2` . What is E:(i) in the outer region of the first plate,(ii) in the outer region of the second plate,(iii) between the

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

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Two coils have a mutual inductance 0.005H The current changes in a coil according to equation `I = I_O sinomegat` Where `I_O = 10 A & ω= 100 π rad s^(-1)` The maximum value of emf in second coil

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 point charge `+10muC` is at a distance `5 cm` directly above the centre of a square of side 10 cm, as shown in Figure. What is the magnitude of the electric flux through the

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

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Two plates of capacitors are at potentials `-10 V and +30 V`. If the separation between the plates be 2m, the electric field between them

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 current in the windings on a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field is 1.0 T, the relative permeability is near

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.The change in magnetic

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

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Match the Column I (AC circuit condition) with Column II (power dissipation) and select the correct answer from the codes given below. Column I Column II A. Resistive circuit p. No power dissipation B. Purely inductive or capacitive circuit q. Maximum power dissipation because of `X_C=X_L` C. L-C -R series circuit r. Power dissipated only in the resistor D. Power dissipated at resonance in L-C -R circuit s. Maximum power dissipation

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

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Is photoelectric emission possible at all frequencies? Give reason for your

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

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Two small conducting sphere of equal radius have charges +1µc and – 2µc respectively and placed at a distance d from each other experience force F1 . If they are brought in contact and separated to the same distance, they experience force F2 . The ratio of F1 to F2 is

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

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Assertion: Inertia and moment of inertia are not same quantities. Reason: Inertia represents the capacity of a body that does not oppose its state of motion or

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

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A system has two charges qA = 2.5 × 10–7 C and qB = –2.5 × 10–7 C located at points A: (0, 0, –15 cm) and B: (0,0, +15 cm), respectively. What are the total charge and electric dipole moment of the

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

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Consider a uniform electric field E = 3 × 103 î N/C. What is the flux of this field through a square of 10 cm on a side whose plane is parallel to the yz

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

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Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is 8.0 × 103 `Nm^2`/C. If the net outward flux through the surface of the box were zero, could you conclude that there were

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

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Consider a sphere of radius R with charge density distributed as ρ (r ) = ≤ kr r R for = > 0 for r R .(a) Find the electric field at all points r.(b) Suppose the total charge on the sphere is 2e where e is the electron charge. Where can two protons be embedded such that the force on each of them is zero. Assume that the introduction of the proton does not alter the negative charge

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

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A cylindrical bar magnet is rotated about its axis (Fig ). A wire is connected from the axis and is made to touch the cylindrical surface through a contact.

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

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Two coils of self inductances 2 mH & 8 mH are placed so close togather that the effective flux in one coil is completely half with the other.The mutual inductance between these coils

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

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If a direct current of value a ampere is superimposed on an alternating current `I = b sinomegat` flowing through a wire, what is the effective value of the resulting current in the circuit

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

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