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The electric potential V is given as a function of distance x (metre) by `V = (5x ^2 + 10x – 9)` volt. Value of electric field at `x = 1` is

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

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It is a well known fact that during a total solar eclipse the disk of the moon almost completely covers the disk of the Sun. From this fact and from the information you can gather from examples 2.3 and 2.4, determine the approximate diameter of the

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

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Assertion: For projection angle `tan^(-1) (4)`, the horizontal and maximum height of a projectile are equal. Reason: The maximum range of projectile is directly proportional to square of velocity and inversely proportional to acceleration due to

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

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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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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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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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The reading of ammeter in the circuit shown will

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In given circuit calculate, voltage across

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For the given

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Initially key was placed on (1) till the capacitor got fully charged. Key is placed on (2) at `t=0`. The time when the energy in both capacitor and inductor will be

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

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Answer the following questions: The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change

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

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If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is

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The magnetic force depends on v which depends on the inertial frame of reference. Does then the magnetic force differ from inertial frame to frame? Is it reasonable that the net acceleration has a different value in different frames of

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The magnetic field at pt. 'O' in the figure shown is ..................... Where AB = CD = 2 cm R1 = 10 cm R2 = 12 cm I = 4

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

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The rectangular coil having 100 turns is turned in a uniform mag. field of `0.05/sqrt2hatj` as shown in the fig. The torque acting on the Loop is

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

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An electron and a proton with equal momentum enter perpendicularly into a uniform magnetic

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Unit of magnetic Flux density is

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A magnet of magnetic moment M and pole strength m is divided in two equal parts, then magnetic moment of each part will

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In the case of bar magnet, lines of magnetic

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The unit of electrical permittivity

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

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