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A parallel plate capacitor has circular plates of radius 8 cm and plate separation 1 mm. The charge on the plates, if potential difference of `100 V` applied

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

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A solid sphere of radius R has a charge Q distributed in its volume with a charge density `rho = k r^a`, where k and a are constants and r is the distance from its centre. If the electric field at `r = R/2` is `1/8`. times that at `r = R,` find the value of

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

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Two electric charges 12µc and –6µc are placed 20cm apart in air. There will be a point P on the line joining these charges and outside the region between them, at which the electric potential is zero. The distance of P from –6µc charge is

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The equations of motion of a projectile are given by `x= 18t and 2y = 54t - 9.8t^2`. The angle `theta` of projection

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

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When a body induces charge on another body without touching

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Radio receiver recives a message at 300m band, If the available inductance is 1 mH, then calculate required

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The force of repulsion between two point charges is F, when these are at a distance of 1 m. Now the point charges are replaced by spheres of radii 25 cm having the charge same as that of point charges. The distance between their centres is 1 m, then compare the force of repulsion in two

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

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An e.m.f is produced in a coil, which is not connected to an external voltage source. This can be due

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Eight dipoles of charges of magnitude e each are placed inside a cube. The total electric flux coming out of the cube will

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Electric Charges The physical property of matter that causes it to experience a force when placed in an electromagnetic field is called electric charge. Electric charge is a characteristic that accompanies fundamental particles, wherever they exist. The process of charging a neutral body by bringing a charged body nearby it without making contact between the two bodies is known as charging by induction.Figures given below are showing the sequential steps of charging a conductor permanently by using the process of charging by induction.When a glass rod is rubbed with silk, it becomes positively charged

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

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Define dielectric constant of a medium. What is its S.I. unit?

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

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The diagram shows a capacitor C and resistor R connected in series to an ac source. V1 and V2 are voltmeters and Ais an ammeter, consider the following statements. (1) Readings in A and V2 are always in phase. (2) Reading in V1 is ahead in phase with reading in V2 . (3) Reading in A and V1 are always in phase. Which of these statements are / is

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

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Electric Field LinesAn electric field line in general is a curve drawn in such a way that the tangent to it at each point is in the direction of the electric field at that point. A field line is a space curve, i.e. a curve in three dimensions. Electric field lines are thus used to pictorially map the electric field around a charge or a configuration of charges.The density of field lines is more near the charge. Away from the charge, the field is weak, so the density of field lines is less.The electric field lines of a negatively charged

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

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Coulomb’s law for electrostatic force between two point charges and Newton’s law for gravitational force between two stationary point masses, both have inverse-square dependence on the distance between the charges and masses respectively. Compare the strength of these forces by determining the ratio of their magnitudes (a) for an

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

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If the rms current in a 50 Hz ac circuit is 5 A, the value of the current 1/300 seconds after its value becomes zero

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

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Two particles of equal mass `m` and charge `q` are placed at a distance of 16 cm. They do not experience any force. The value of `q/m`

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

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The electrostatic potential energy between proton and electron separated by a distance of `1 A^o`

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

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In the circuit shown in figure below, the potential difference across the `4.5 muF` capacitor

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Assertion: Charge carriers do not move with acceleration but with a steady drift velocity. Reason: Charge carriers undergo collisions with ions and atoms during

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

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Magnetic Field of a SolenoidMohan tightly wound a very long copper wire on a PVC pipe and carefully took the pipe out. The two ends of the copper wire then attached to a battery. This cylindrical shape of copper wire showed few properties of a bar magnet. Later he found that it is called a solenoid and this solenoid is used in several devices such as door bell, relay switch etc. The magnetic field of a solenoid is given below.The magnetic field strength of a solenoid having n turns is `B=mu_0nl`, where, `I` is the current flowing in the solenoid.The

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

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