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infinite number of straight wires each carrying current i are equally placed as shown in the fig. adjacent wires have curent in opposite direction. net magnetic field at point p is *Image* a. μi ln2/4π 3 a k b. μi ln4/4π ...
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*Image* ...
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infinite number of straight wires each carrying current i are equally placed as shown in the fig. adjacent wires have curent in opposite direction. net magnetic field at point p is *Image* a. μi ln2/4π 3 a k b. μi ln4/4π ...
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1.Determine the magnetic field at the centre of the current carrying wire arrangement shown in the figure. the arrangement extends to infinity. the wires joining the successive squares are along the line passing through the c ...
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What is the magnitude of magnetic field at centre O of loop of radius √2 m made of uniform wire when a current of 1 A enters in the loop and taken out of it by two long wire as shown ...
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*Image* Pl solve it ...
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A particle located at x=o at time t=0 starts moving along the positive X-direction with a velocity v that varies with time is? explain ...
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a battrry of emf 10V and internal resistance 0.5 ohms is connected across a variable resistance R. What is the value of R for which the power delivered in it is maximum? ...
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A cannon ball is fired with a velocity v such that it makes an angle θ with the horizontal. At the highest point,the cannon ball splits into two parts of equal masses. One of the parts retraces the initial path of the ball. ...
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two conducting spheres of radii r1 and r2 have charge q1 and q2 respectively.after bringing them in contact,what happens to the energy of the system? a)no change b)increase if q1r2≠q2r1 c)decrease always d)decrease if q1r2â ...
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*Image* ...
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A rod of length 10 m. is travelling on a smooth,level,horizontal surface.Beyond a point A,the floor ceases to be smooth and the coefficient of friction is k=0.1.The rod is travelling such that it is moving towards the point A ...
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A particle is projected from the bottom of an inclined plane at an angle θ with the surface of the incline.The angle of the inclined plane is 45.For what value of θ will the particle retrace it's path after collision with t ...
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{Shastras Q-21} a point charge q is brought from infinity and is placed at the center of a conducting neutral spherical shell of inner radius 'a' and outer radius 'b', then work done by external agent is. A}0 B}kq2/2b C}kq2/2 ...
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Four point charges each of charge +q are rigidly fixed at the four corners of a square planar soap film of side a.The surface tension of the soap film is S.the system of charges and planar film are in equilibrium.Then find a ...
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*Image* ...
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A parallel plate capacitor of capacitance C is connected to a battery and is charged to a potential difference V. Another capacitor of capacitance 2C is similarly charged to a potential difference 2V. The charging battery is ...
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How to find the potentials at points A,B,C,D,E,F. *Image* ...
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Why does a porter, carrying a heavy load on his back, bend forward? ...
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TWO CONDUCTING plates each of area A are separated by distance d and they are parallel to each other. A conducting medium of varying conductivity fills space between them. the conductivity varies linearly σ to 2σ as we move ...
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*Image* ...
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A bulb is made using two filaments. A switch selects whether the filaments are used individually or in parallel. When used with a 15 V battery, the bulb can be operated at 5 W, 10 W or 15 W. What should be the resistances of ...
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Condenser A has a capacity of 15 when it is filled with a medium of dielectric constant 15. Another condenser B has a capacity 1 with air between the plates. Both are charged separately by a battery of 100V. After charging, b ...
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why does potential drop across a capacitor????? ...
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Determine the capacitance of a system consisting of a metal ball of radius a and an infinite conducting plane separated from the centre of the ball by the distance b if b>>a. ...
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An unknown cell balances 300 cm of wire in a potentiometer circuit, but the balance length reduces to 280 cm when a resistance of 28 ohm is added in parallel with the cell.A standard cell of emf 1.1V balances 220 cm on the sa ...
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A cylindrical pulley of mass M and radius R is connected to another pulley of mass M/2 ,R/2 through a massless string as shown. If sufficient string is wrapped over larger pulley,find the accleration of mass M attached to the ...
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How to calculate inclination angle when both x as well as y coordinates of the target is given (in projectile motion)? (as well as initial velocity) ...
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How to calculate inclination angle when both x as well as y coordinates of the target is given (in projectile motion)? (as well as initial velocity) ...
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a thin half ring of radius R=20cm is uniformly charged with total charge q=0.70nC. find the magnitude of the electric field strength at the carvature centre of the half ring. ...
