Recent questions tagged #mcq

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A 2 Mev proton is moving perpendicular to a uniform magnetic field of 2.5 tesla. The force on the proton

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

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A proton is projected with a speed of `2 xx10^6 m/s` at an angle of `60^0` to the X-axis. If a uniform mag. field of 0.104 tesla is applied along Y-axis, the path of proton is

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

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A charged particle moves in a uniform mag. field. The velocity of the particle at some instant makes an acute angle with the mag. field. The path of the particle will

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

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A, proton, a deuteron and `alpha`- an particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If `r_ p` , `r_d` and denote respectively the radii of trajectories of these particles,

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

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Two particles A and B of masses `m_A` and `m_B` respectively and having the same charge are moving in a plane. A uniform mag. field exists perpendicular to this plane. The speeds of the particles are `V_A` and `V_B` respectively and the trajectories are as shown in the figure,

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

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An electron and a proton with equal momentum enter perpendicularly into a uniform magnetic

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

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A current I, carrying wire AB is placed near an another long wire CD carrying current `I_2` As shown in Fig. If free to move, wire AB will

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

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A conducting rod of length ? [cross-section is shown] and mass m is moving down on a smooth inclined plane of inclination `theta` with constant speed `v` . A vertically upward mag. field `vecB` exists in upward direction. The magnitude of mag. field `vecB` is

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

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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

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

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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

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

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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

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

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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

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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