Investigate:
In the givenfigure,protractor shows`30^@`.Look at the same figure through a magnifying galss.Does the angle become larger ?Does the size of the angle change!.\

Answer the following question: In viewing through a magnifying glass, one usually positions one’s eyes very close to the lens. Does angular magnification change if the eye is moved back?

A figure divided into squaes each of size 1 mm^2 is being viewed at a distance of 9 cm through magnifying lens of focal lengh 10 cm, held close to the eye. Draw the ray diagram showing the formation for the image.

A circular coilof radius 0.157 m has 50 number of turns. It is placed such that its axis is in magnetic meridian. A dip needle is supported at the centre of the coil with its axis of rotation horizontal, and in the plane of the coil. The angle of dip is 30^(@) when a current flows through the coil. The angle of dip becomes 60^(@) on reversing the current. Find the current in the coil assuming that the magnetic field due to the coil is smaller than the horizontal component of earth's magnetic field, H =3xx10^(-5) T.

Answer the following questions: The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification?

After rotating by 60° about a centre, a figure looks exactly the same as its original position. At what other angles will this happen for the figure

What does the angle look like ?The hour hand of the clock moves 5 to 7 .Is the angle moved by hour hand more than 1 right angle?

The bob A of a pendulum released from 30^@ to the vertical hits another bob B of the same mass at rest on a table as shown in Fig. 6.15. How high does the bob A rise after the collision ? Neglect the size of the bobs and assume the collision to be elastic.

What does the angle made by the hour hand of the clock look like when it moves from 5 to 7 . Is the angle more than 1 right angle ?

How does dip angle change when one moves from magnetic equator to pole?