What happens when the radiations obtained from a radio active substance are passed through an electric field, marks are found at three places on the photographic plate placed in its path. Give reason.?

Two recangular plates A and B placed at a distance 2a apart, are connected to a battery to produce an electric field. There are insulators between plantes C and other two plates. A magnetic field exists along z-axis. A charged particle of mass m and charge q passes through a hole at the middle of the plate A with velocity v and strikes at Q which is the middle of the bottom edge of plate B after passing through a hole inplate C. If E = mv^(2)//qa , what will be the speed of the particle at Q?

The diagram in Fig. shows a radioactive source S placed in a thick lead walled container. The radiations given out are allowed to pass through a magnetic field (shown as X) acts perpendicular to the plane of paper inwards. Arrows show the paths of the radiations A, B and C. (a) Name the radiations labelled A, B and C. (b) Explain clearly how you used the diagram to arrive at the answer in part (a).

What type of chemical reactions take place when electricity is passed through water ?

Suppose a monochromatic X-ray beam of wavelength 100 pm is sent through a Young's double slit and the interference pattern is observed on a photographic plate placed 40 cm away from the slit. What should be the separation between the slits so that the successive maxima on the screen are separated by a distance of 0.1 mm?

A glass sphere has radius of 5.0 cm and a refractive index of 1.6. A paperweight is constructed by slicing through the sphere on a plate that is 2.0 cm from the centre of the sphere and perpendicular to radius of the sphere that passes through the centre of the circle formed by the intersection of the plane and the sphere. The paperweight is placed on a table and viewed from directly above an observer who is 8.0 cm from the table top, as shown in figure. When viewed through the paperweight, how far away does the table top appear to the observer?

Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions.in terms of A, B and C. Which among the three causes the least biological damage externally?

Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following question in terms of A, B and C. Which among the three causes the least biological damage extremlly?

A particle of mass m is placed at a distance R from centre of a uniformly dense thin ring of mass m rand radius R on a axis passing through its centre and perpendicular to its plane. Find the speed of the particle when it reaches at the centre fo the ring due to their mutual gravitation force.

A certain nucleus X has a mass number 14 and atomic number 6. The nucleus X changes to ""_(7)Y^(14) after the loss of a particle. A radioactive substance is oxidized. What change would you expect to take place in the nature of its radioactivity ? Give a reason for your answer.

Three small spheres x,y, and z carry charges of equal magnitudes and with signs shown in fig. They are palced at the vertices of an isosceles triangle with the distance betwwen x and y equal to the distance between x and z. sphere y and z are held in place, but sphere x is free to move on a frictionless surface. (a) what is the direction of the electric force on sphere x at the point shown in the figure? (b) Which path is sphere x likely to take when released?