Magnetic Effects of Electric Current — Science STD 10 — Question

A hollow glass prism gives:

Linear magnification produced by a convex lens can be:

One end of a wire carrying current in the downward direction is placed in a trough containing mercury (so that the direction of force experienced by it is clearly visible). Two pole pieces N and S are placed on each side as shown in the diagram (so as to provide uniform magnetic field).

What is the direction of force experienced by the wire?

A student is using a convex lens of focal length 10 cm to study the image formation by a convex lens for the various positions of the object. In one of his observations, he may observe that when the object is placed at a distance of 20 cm from the lens, its image is formed at (select the correct option):

A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

Having two eyes gives a person:

1. Deeper field of view.
2. Coloured field of view.
3. Rear field of view.
4. Wider field of view.

How does the eye change in order to focus on near or distant objects?

1. The lens moves in or out.
2. The retina moves in or out.
3. The lens becomes thicker or thinner.
4. The pupil gets larger or smaller.

A convex lens:

The sky appears blue because some of the blue component of sunlight is scattered by:

1. Gas molecules present in air.
2. Dust particles present in air.
3. Water droplets suspended in air.
4. Soot particles present in air.

For a ray of light passing through a glass slab.

The lateral displacement was correctly measured as: