P-2 Life Processes in Living Organisms Part – 2 — Science STD 10 — Question

Draw a neat labelled diagram : Froth floatation method.

Draw a neat labelled diagram : Hydraulic separation method.

What is the advantage of using a convex mirror as a rear-view mirror in vehicles as compared to a plane mirror? Illustrate your answer with the help of labelled diagrams.

Make a table based on forms of energy and corresponding devices:

	Forms of Energy	Devices
i.	Electric	________________
ii.	Mechanical	Sewing machine, Bicycle
iii.	Thermal	________________
iv.	________________	Solar cooker, Solar heater

The building in which you are residing has caught fire on the ground floor. What necessary rescue steps will you take?

An object 20cm from a spherical mirror gives rise to a virtual image 15cm behind the mirror. Determine the magnification of the image and the type of mirror used.

Explain why, a stick half immersed in water appears to be bent at the surface. Draw a labelled diagram to illustrate your answer.

Take two coils of about 50 turns. Insert them over a non-conducting cylindrical roll, as shown in the following figure (thick paper roll can be used). Connect coil 1 to a battery with a plug key. Connect coil 2 to a galvanometer. Plug the key and observe the deflection in the galvanometer. Unplug the key and again observe the deflection. (HOTS)

(i) What do you observe when you switch on the current in coil 1, i.e. when you connect coil 1 to the battery?
(ii) What do you observe when current in coil 1 reaches a steady value or zero?
(iii) Why is current induced in coil 2 when we connect coil 1 to a battery?

(i) What do you observe in the following pictures?
(ii) Which effects of electric current do you find?

Observe the given figure showing the orbit of a planet moving around the Sun and write the three laws related to it:
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State the laws related to the given diagram:
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State Kepler's three laws of motion.