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A deutron of K. E. 50 kev is describing a circular orbit of radius 0.5 m in a plane perpendicular to magnetic field `vecB`. The K.E. of the proton that describe a circular orbit of radius 0.5 m in the same plane with the same `vecB` is

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A magnetic field existing in a region is given by `B=Bo[1+x/l]hatk` . A square Loop of side l and carrying current I is placed with edges (sides) parallel to X-Y axis. The magnitude of the net magnetic force experienced by the Loop is

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The forces existing between two parallel current carrying conductors is F. If the current in each conductor is doubled, then the value of force will

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At a given place the horizontal componnent of earth's field is 0.2 G. If a vertical wire carries a current of 30 Amp upward, what is the magnitude and direction of the force on 1 meter of wire

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

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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

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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

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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

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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

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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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