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A Galvanometer has a resistance G and 9 current `I_G` flowing in it produces full scale deflection. S1 is the value of the shunt which converts it into an ammeter of range 0 to I and S2 is the value of the shunt for the range 0 to 2I. The ratio `S_1/ S_2` is

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

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A student connect a moving coil voltmeter V and 9 moving coil Ammeter A and resistor R as shown in figure ? If the voltmeter reads 10 volt and the ammeter reads 2 Amp then R is

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

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The deflection in a Galvanometer falls from 50 division to 20 when `12Omega` shunt is applied. The Galvanometer resistance is

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

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In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an ele. potential V and then made to describe semicircular paths of radius R using a magnetic field B.If V and B are kept constant, the ratio Charge on the ion /mass of the ion will be proportional

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

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A Galvanometer of resistance `50Omega` is connected to a battery of 3 volt along with a resistance of `2950Omega` in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should

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

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A Galvanometer coil has a resistance of `15Omega` and gives full scale deflection for a current of 4 mA. To convert it to an ammeter of range 0 to 6

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

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The deflection in moving coil Galvanometer is reduced to half when it is shunted with a `40Omega` coil. The resistance of the Galvanometer is

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

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A straight rod of mass m and length L is suspended from the two idential springs as shown in figure. The spring is streched a distawnce `y_0` due to the weight of the wire. The circuit has total resistance R. when the magnetic field perpendicular to the plane of paper is switched on, springs are observed to extend further by the same distance `y_0` the magnetic strength is

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

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A conducting circular loop of radius a carries a constant current I. It is placed in a uniform magnetic field `vecB`, such that `vecB` is perpendicular to the plane of the Loop. The magnetic force acting on the Loop is

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

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Two thin long parallel wires separated by a distance Y are carrying a current I Amp each. The magnitude of the force per unit length exerted by one wire on their is

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

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A closed Loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segment PS, SR and RQ are F1 , F2 and F3 respectivley and are in the plane of the paper and along the directions shown, the force on the segment QP is

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If two streams of protons moive parallel to each other in the same direction, then

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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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In a moving coil galvanometer, the deflection of the coil `theta` is related to ele. current I by the

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

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The unit of ele. current 'AMPEAR' is the current which when flowing through each of two parallel wires spaced 1 meter apart in vaccum and of infinite length will give rise to a force between them equal to ....................

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

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A Loop carrying current I lies in XY - plane as shown in the figure. The unit vector `hatk` is comming out of the plane of the paper. The magnetic moment of the current Loop

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

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A coil having N turns is wound tightly in the form of a spiral with inner and outer radii 'a' and 'b' respectively. When a current I passes through the coil, the magnetic field at the centre is

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

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A particle of mass m and charge q moves with a constant velocity `v` along the positive x - direction. It enters a region containing a uniform magnetic field B directed along the negative z-direction, extending from x = a to x = b. The minimum value of required so that the particle can just enter the region x > b

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

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An electron moving with a speed along the positive x-axis at y = 0 enters a region of uniform magnetic field `vecB= Bohatk` which exists to the right of y - axis. The electron exits from the region after some time with the speed at co-ordinate y

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

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A uniform conducting wire ABC has a mass 10 gram. A 2 Amp current is flowing through it. The wire is kept in uniform magnetic field B = 2 tesla the acceleration of the wire will be

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

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