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A long string with a charge of `lambda` per unit length passes through an imaginary cube of edge `l`. The maximum possible flux of the electric field through the cube will be

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

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The electric Potential at a point P (x, y, z) is given by `V = –x^2y – xz^3 + 4` The electric field `vecE` at that point is

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

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A sphere of radius 1cm has potential of 8000 v, then energy density near its surfacewill be

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Conservation of Momentum This principle is a consequence of Newton’s second and third laws of motion.In an isolated system (i.e. a system having no external force), mutual forces (called internal forces) between pairs of particles in the system causes momentum change in individual particles.Let a bomb be at rest, then its momentum will be zero. If the bomb explodes into two equal parts, then the parts fly off in exactly opposite directions with same speed, so that the total momentum is still zero. Here, no external force is applied on the system of particles (bomb).A shell of mass 10 kg

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

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A particle is acted by a constant power. Then, which of the following physical quantity remains

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There are many types of spring. Important among these are helical and spiral springs as shown in figure.(a) (b) Usually, we assume that the springs are massless. Therefore, work done is stored in the spring in the form of elastic potential energy of the spring. Thus, potential energy of a spring is the energy associated with the state of compression or expansion of an elastic spring.The potential energy of a body is increases in which of the following

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

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For the damped oscillator shown in Fig., the mass m of the block is 200 g, k = 90 N `m^(–1)` and the damping constant b is 40 g `s^(–1)`. Calculate (a) the period of oscillation, (b) time taken for its amplitude of vibrations to drop to half of its initial value, and (c) the time taken for its mechanical energy to drop to half its initial value.

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

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A fully loaded Boeing aircraft has a mass of `3.3 × 10^5`kg. Its total wing area is 500 `m^2`. It is in level flight with a speed of 960 km/h. (a) Estimate the pressure difference between the lower and upper surfaces of the wings (b)Estimate the fractional increase in the speed of the air on the upper surface of the wing relative to the lower surface. [The density of air is ρ = 1.2 kg

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

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In a LCR circuit capacitance is changed from C to 2C. For the resonant fequency to remain unchanged, the inductance should be change from L

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

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Explain: A certain region of space is to be shielded from magnetic fields. Suggest a

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A ball of superconducting material is dipped in liquid nitrogen and placed near a bar magnet. What will be the direction of it’s magnetic

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One metallic sphere A is given positive charge whereas another identical metallic sphere B of exactly same mass as of A is given equal amount of negative charge.

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

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An object A has a charge of `-2muC` and the object B has a charge of `+6 muC`. Which of the following is

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

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Each corner A and C has charge `q_1` and on the each corner B and D, has charge `- q_2` of a square ABCD of side `l`. Charge at A is in equilibrium, then the ratio `q_1/q_2` will

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The figure shows some of the electric field lines corresponding to an electric field. The figure

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

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Find the correct diagram of electric lines of forces for negative

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

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Two parallel infinite line charges `+ lambda and -lambda` are placed with a separation distance R in free space. The net electric field exactly mid-way between the two line charges

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

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Assertion: The gravitational force is the dominating force in the universe. Reason: The coulomb force is weaker than the gravitational

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Assertion: A capacitor can be given only a limited quantity of charge. Reason: Charge stored by a capacitor depends on the shape and size of the plates of capacitor and the surrounding

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

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Five conductors are meeting at a point `x` as shown in the figure. What is the value of current in fifth

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

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