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A bent rod `PQR (PQ = QR =l)` shown here is rotating about its end P with angular speed `omega` in a region of transverse magnetic field of strength

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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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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

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For an LCR series circuit, phasors of current i and applied voltage `V=V_0 sinomegat` are shown in diagram at `t =0`. Which of the following is/are

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A cylindrical space of radius R is filled with a uniform magnetic induction B parallel to the axis of the cylinder. If `(dB)/(dt) =` constant, the graph, showing the variation of induced electric field with distance r from the axis of cylinder, isConsider a conducting circular loop placed in a magnetic field as shown in figure. When magnetic field changes with time, magnetic flux also changes and emf `e=-(dphi)/(dt)` is induced. If resistance of loop is R then induced current is `i=e/R`. For current, charges must have non–zero average velocity. Magnetic force cannot make the stationary charges to move. Actually

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A line charge `lambda` per unit length is pasted uniformly onto the rim of a wheel of mass m and radius R. The wheel has light non–conducting spokes and is free to rotate about a vertical axis as shown in figure.A uniform magnetic field B exist as shown in figure. What is the angular velocity of the wheel when the field is suddenly switched off?Consider a conducting circular loop placed in a magnetic field as shown in figure. When magnetic field changes with time, magnetic flux also changes and emf `e=-(dphi)/(dt)` is induced. If resistance of loop is R then

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The emf across `AB` at `t=l/(2v)` isA conducting square wire frame ABCD of side `l` is pulled by horizontal force so that it moves with constant velocity v. A uniform magnetic field of strength B is existing perpendicular to the plane of wire. The resistance per unit length of wire is `lambda` and negligible self inductance. If at `t= 0,` frame is just at the boundary of magnetic field.

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Potential difference across BC at time `t=l/(2v)` isA conducting square wire frame ABCD of side `l` is pulled by horizontal force so that it moves with constant velocity v. A uniform magnetic field of strength B is existing perpendicular to the plane of wire. The resistance per unit length of wire is `lambda` and negligible self inductance. If at `t= 0,` frame is just at the boundary of magnetic field.

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Find the applied horizontal force on BC, (F) as a function of time `'t' (t < l/v)`A conducting square wire frame ABCD of side `l` is pulled by horizontal force so that it moves with constant velocity v. A uniform magnetic field of strength B is existing perpendicular to the plane of wire. The resistance per unit length of wire is `lambda` and negligible self inductance. If at `t= 0,` frame is just at the boundary of magnetic field.

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Magnetic flux in a circular coil of resistance `10Omega` changes with time as shown in figure. `ox` direction indicates a direction perpendicular to paper inwards. Column–I Column–II (A) At 1 second induced current is (P) Clockwise (B) At 5 second induced current is (Q) Anticlockwise (C) At 9 second induced current is (R) 0.5 A (D) At 15 second induced current is (S) 5 A (T) None of these

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In the circuit shown in figure `E=25V, L=2H, C=60 muF, R_1 = 5Omega and R_2=10Omega`. Switch S is closed at `t = 0.` Column-I Column-II (A) Current through `R_1` at t = 0 (P) 0 (B) Current through `R_2` at t = 0 (Q) 5A (C) Current through `R_1` at `t =oo` (R) 2.5 A (D) Current through `R_2` at `t =oo` (S) 7.5 A (T) None of these

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An inductor `(X_L=2Omega)` a capacitor `(X_C=8Omega)` and a resistance `(8Omega)` is connected in series with an ac source. The voltage output of A.C source is given by `V=10 cos 2pi50t`. Find the instantaneous p.d. between A and B when the voltage output from source is half of its

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Figure shows a uniform circular loop of radius ‘a’ having specific resistance `rho` placed in a uniform magnetic fieldB perpendicular to plane of figure. A uniform rod of length 2a & resistance R moves with a velocity v as shown.Find the current in the rod when it has moved a distance `a/2` from the centre of circular loop.[Given `B=sqrt3,a=2,v=3,rho=9/(4pi), R=2sqrt3` all in SI

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Alternating current is transmitted to distant

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`220 V, 50 Hz, AC` is applied to a resistor. The instantaneous value of voltage

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An alternating current of rms value `10 A` is passed through a `12 Omega`. resistor. The maximum potential difference across the resistor

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Same current is flowing in two alternating circuits. The first circuit contains only inductance and the other contains only a capacitor. If the frequency of the emf of AC is increased, the effect on the value of the

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An inductance and a resistance are connected in series with an AC potential. In this

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An AC voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to `3Omega`, the phase difference (in rad) between the applied voltage and the current in the circuit is

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In a circuit containing R and L , as the frequency of the impressed AC increases, the impedance of the

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