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The magnetic potential energy stored in a certain inductor is `25 mJ`, when the current in the inductor is `60 mA`. This inductor is of

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

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L-C Oscillations When a capacitor is supplied with an AC circuit, it gets charged.When this charged capacitor is connected with an inductor, current flows through inductor, giving rise to magnetic flux. Hence, induced emf is produced in the circuit. Due to this, the charge on the capacitor decreases and an equivalent amount of energy is stored in the inductor in the form of magnetic Field.An AC circuit contains a capacitor of capacitance `10^(-6)F` and an inductor of inductance `10^(-4) H`. The frequency of electrical oscillations will

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

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The Transformer Transformer is a device, which is used to increase or decrease the alternating voltage. The transformers are of the following types (i) Step-up transformer (ii) Step-down transformerTransformer is based upon the principle of mutual induction. It consists of two coils, primary coil `(p)` and secondary coil `(s)`, insulated from each other wounded on soft iron core.Often the primary coil is the input coil and secondary coil is the output coil. These soft iron cores are laminated to minimise eddy current loss.The ratio of secondary to primary turns in an ideal transformer is 4 : 5. If power input

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A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0cm is used, what is the angular magnification of the

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(i) (a) Draw a labelled ray diagram to show the formation of image in an astronomical telescope for a distant object. (b) Write the three distinct advantages of a reflecting type telescope over a refracting type telescope, (ii) A convex lens of focal length 10 cm is placed coaxially 5 cm away from a concave lens of focal length 10 cm. If an object is placed 30 cm in front of the convex lens. Find the position of the final image formed by the combined

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

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Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. How fast does a hydrogen atom have to travel in order to have the same momentum as that of the

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What are the time period for the following?

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Position of a particle in shm is y = 3 sin ( π 2 t + π 4 ) m

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What is phase difference?

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A charged metallic sphere can charge another uncharged sphere

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What is the force between two small charged spheres having charges of 2 × 10–7C and 3 × 10–7C placed 30 cm apart in

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If there were only one type of charge in the universe,

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The self inductance L of a solenoid of length l and area of crosssection A, with a fixed number of turns N increases

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The magnetic flux linked with a coil, in webers, is given by the equation `phi=4t^2- 3t+ 7` . Then the magnitude of induced emf at 2 sec will be

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When the number of turns in a coil is make four time without any change in length of the coil, its self inductance

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

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In the circuit shown the capacitor has charge Q. At `t=0` sec the key is closed. The charge on the capacitor at the instant potential difference across the inductor `L_1` is zero,

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Must every magnetic configuration have a north pole and a south pole? What about the field due to a

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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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Self-Induction Self-induction is the property of a coil by virtue of which the coil opposes any change in the strength of current flowing through it by inducing an emf in itself. This induced emf is also called back emf. When the current in a coil is switched ON, then the self induction opposes the growth of the current and when it is switch OFF, then the self-induction opposes the decay of the current.The inductor has inductance `0.54 H` and carries a current that is decreasing at a uniform rate `(di)/(dt)=- 0.03` A/s, then dt the induced emf will

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

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