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What is the angular acceleration of the rod at the instant of releasing the rod? A thin homogeneous rod of mass m and length `l` is free to rotate in vertical plane about a horizontal axle pivoted at one end of the rod. A small ball of mass m and charge q is attached to the opposite end of this rod. The whole system is positioned in a constant horizontal electric field of magnitude mg `E=(mg)/(2q)`. The rod is released from shown position from

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

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An infinite plane of charge with `sigma=2epsilon_0''C/ m^2`is tilted at a 37° angle to the vertical direction as shown below. Find the potential difference, `V_A–V_B` in volts, between points A and B at 5 m distance apart. (where B is vertically above

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

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Equal charges q are placed at the vertices A and B of an equilateral triangle ABC of side a. The magnitude of electric field at the point c is

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

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Three identical charges each of 2µc are placed at the vertices of a triangle ABC as shown in the figure. If AB + AC = 12 cm and AB . AC = `32cm^2` , the potential energy of the charge at A is

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

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The angle θ covered by a body in rotational motion is give by the equation `θ = 6t + 5t^2 + 2t^3`. Determine the value of instantaneous angular velocity and angular acceleration at time `t =

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

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What is SHM?

asked Mar 17, 2022 in 11th Physics by anonymous

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Fig . shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass

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

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Consider a uniform electric field E = 3 × 103 î N/C. What is the flux through the same square if the normal to its plane makes a 60° angle with the

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

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Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is 8.0 × 103 `Nm^2`/C. What is the net charge inside the box?Why or Why

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

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Fig. represents a crystal unit of cesium chloride, CsCl. The cesium atoms, represented by open circles are situated at the corners of a cube of side 0.40nm, whereas a Cl atom is situated at the centre of the cube. The Cs atoms are deficient in one electron while the Cl atom carries an excess electron.(a) What is the net electric field on the Cl atom due to eight Cs atoms?(b) Suppose that the Cs atom at the corner A is missing. What is the net force now on the Cl atom due to seven remaining Cs

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

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Five charges, q each are placed at the corners of a regular pentagon of side ‘a’ (Fig.).

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

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A positive charge Q is uniformly distributed along a circular ring of radius R. A small test charge q is placed at the centre of the ring as shown in then

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

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A rectangular loop of wire ABCD is kept close to an infinitely long wire carrying a current` I (t ) = I_o (1 – t /T ) `for 0 ≤ t ≤ T and `I (0) = 0 'for' t > T` (Fig. ). Find the total charge passing through a given point in the loop, in time T. The resistance of the loop is R.

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

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Explain why the reactance offered by an inductor increases with increasing frequency of an alternating

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

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A coil of inductance 8.4 mH and resistance `6Omega` is connected to a 12 V battery. The current in the coil is 1A in the

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

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

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

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The Equation of current in AC circuit is `I=4sin[100pi+pi/3] A` . Calculate. (i) RMS Value (ii) Peak Value (iii) Frequency (iv) Initial phase (v) Current at `t =

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

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A circuit consisting of an inductance and a resistacne joined to a 200 volt supply (A.C.). It draws a current of 10 ampere. If the power used in the circuit is 1500 watt. Calculate the wattless

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

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An LC circuit contains a 20mH inductor and a `50muF` capacitor with an initial charge of 10mC. The resistance of the circuit is negligible. Let the instant the circuit is closed to be `t = 0.`At what times is the total energy shared equally between inductor and the

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

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In a chamber, a uniform magnetic field of 6.5 G (1 G = 10 –4 T) is maintained. An electron is shot into the field with a speed of 4.8 × 106 m s–1 normal to the field. Explain why the path of the electron is a circle. Determine the radius of the circular orbit. (e = 1.5 × 10–19 C, `m_e` = 9.1×10–31

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

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