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A proton moves with a speed of `7.45×10^5 m'/'s` directly towards a free proton originally at rest. Find the distance of closest approach for the two protons. Given : `1/(4pi epsilon_0)= 9×10^9 (N-m)^2/c^2 ; m_p=1.67×10^(–27) kg and e = 1.6×10^(–19)

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

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Two equal negative charges –q are fixed at points (o, a) and (o, –a). A positive charge Q is released from rest at the point (2a, o) on the X - axis. The charge Q will

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

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Three identical spheres each having a charge q and radius R, are kept in such a way thateach touches the other two spheares. The magnitude of the electric force on any spheredue to other two is

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

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An electric dipole coincides on z axis and its mid point is on origin of the cartesian co-ordinate system. The electric field at an axial point at a distance z from origin is `vecE`(z) and electric field at an equatorial point at a distance y from origin is `vecE(y) |vecE_((z))/vec E_((y))| (y = z > > a) =`

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

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Three charges 2q, –q, –q are located at the vertices of an equilateral triangle. At the centre of the

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In the electric field of a point charge q, a certain charge is carried from point A to B, C, D and E. Then the work done

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The farthest objects in our Universe discovered by modern astronomers are so distant that light emitted by them takes billions of years to reach the Earth. These objects (known as quasars) have many puzzling features, which have not yet been satisfactorily explained. What is the distance in km of a quasar from which light takes 3.0 billion years to reach us

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

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Can a simple pendulum experiment be done inside a

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

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A spring having with a spring constant 1200 N `m^(–1)` is mounted on a horizontal table as shown in Fig. . A mass of 3 kg is attached to the free end of the spring. The mass is then pulled sideways to a distance of 2.0 cm and released. Determine (i) the frequency of oscillations, (ii) maximum acceleration of the mass, and (iii) the maximum speed of the

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

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Two narrow bores of diameters 3.0 mm and 6.0 mm are joined together to form a U-tube open at both ends. If the U-tube contains water, what is the difference in its levels in the two limbs of the tube ? Surface tension of water at the temperature of the experiment is `7.3 × 10^(–2)` N `m^(–1)`. Take the angle of contact to be zero and density of water to be `1.0 × 10^3` kg `m^(–3)` (g = 9.8 m

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

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Find the potential energy of a system of four particles placed at the vertices of a square of side l. Also obtain the potential at the centre of the

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

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An infinite line charge produces a field of 9 × 104 N/C at a distance of 2 cm. Calculate the linear charge

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

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Two charges q and –3q are placed fixed on x-axis separated by distance ‘d’. Where should a third charge 2q be placed such that it will not experience any

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

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A resistor and a capicitor are connected in series with an ac source. If the potential drop across the capacitor is 5 V and that across resistor is 12 V, the applied voltage

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

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The power factor of an ac circuit having resistance (R) and inductance (L) connected in series and an angular velocity w

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A 50 W, 100 V lamp is to be connected to an AC mains of 200 V, 50 Hz. What capacitance is essential to be put in series with the lamp

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

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A capacitor, a resistor and a 40 mH inductor are connected in series to an 60Hz AC source of frequency 60Hz, calculate the capacitance of the capacitor, if the current is in phase with the voltage. Also calculate the value of X and

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

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A coil, a capacitor and an A.C. source of rms voltage 24 V are connected in series, By varying the frequency of the source, a maximum rms current 6 A is observed, If this coil is connected to a bettery of emf 12 V, and internal resistance `4Omega` , then calculate the current through the

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 time is the energy stored is completely

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

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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

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

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