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In given circuit find out (i) impedance of circuit (ii) current in

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Calculate impedance of the given circuit

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A conducting loop is kept so that its center lies at the origin of the coordinate system. A magnetic field has the induction B pointing along Z-axis as shown in the

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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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S is the surface of a lump of magnetic

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Use (a) the Ampere’s law for H and (b) continuity of lines of B, to conclude that inside a bar magnet, lines of H run from the N pole to S pole,

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Assume the dipole model for earth’s magnetic field B which is given by BV = vertical component of magnetic field = `μ_0 /(4π) (2mcosθ )/r^3 ` BH = Horizontal component of magnetic field = `μ_0 /(4π) (sinθm)/r^3 ` θ = 90° – lattitude as measured from magnetic equator. Find loci of points for which

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Show that a force that does no work must be a velocity dependent

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A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that `vecB` is in plane of the coil. If due to a current I in the triangle a torque `tau` acts on it, the side l of the triangle is

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

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Assertion: When we produce charge `q_1` on a body by rubbing it against another body which gets a charge `q_2`, in the process, then `q_1 + q_2 = 0`. Reason: Charge on an isolated system remains

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A parallel plate capacitor is made by stacking `n` equally spaced plates connected alternately. If the capacitance between any two plates is `C`, then the resultant capacitance

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Across each of two capacitors of capacitance `1muF` and a potential difference of `10 V` is applied. Then, positive plate of one is connected to the negative plate of the other and negative plate of one is connected to the positive plate of the other. After contact, charge an each plate will

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A `5.0 muF` capacitor is charged to a potential difference of `800 V` and discharged through a conductor. The energy given to the conductor during the discharge

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

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Assertion: Polar molecules do not have permanent dipole moment. Reason: In polar molecules, the centre of positive and negative charges coincides even when there is no external

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A meter bridge is set up as shown in figure, to determine an unknown resistance `X` using a standard `10 Omega` resistor. The galvanometer shows null point when tapping key is at `52 cm` mark. The end-corrections are `1 cm and 2 cm` respectively for the ends A and B. The determined value of `X`

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The variation of magnetic field with distance d from centre of current carrying solenoid is best represented

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Time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent

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Which of the following diagram is correct for the direction of magnetic force on a charge moving in a uniform magnetic

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Assertion: Coefficient of self-induction of an inductor depends upon the rate of change of current passing through it.Reason: From `e=L(di)/(dt)`We can see that, `L=e/((di)/(dt))` or `L prop

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

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The ratio of secondary to the primary turns in a transformer is 3 : 2. If the power output be P, then the input power neglecting all losses must be equal

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

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