Our behaviour with HIV infected person must be normal or should not be normal? What is your opinion? Write it with correct explanation.

Solve the following problems : If the reflected ray makes an angle of 60⁰ with the normal , what angle must the incident ray make with the normal ?

Practice Problems : If the reflected ray makes an angle of 70⁰ with the normal , what angle must the incident ray make with the normal ?

Choose the correct alternative and write its alphabet against the sub question number: What should be done if gas cylinder at your house catches fire? Water should be sprinkled Sand, soil should be put on it Cylinder should be covered with wet blanket one should run away

A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires. What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero?

Select and write the correct answer: The normal chromosomal pair present in humans is .

A colour blind father has a daughter with normal vision. The daughter marries a man with normal vision. What is the probability that her children are colour blind. Generate a pedigree chart to arrive at your answer.

Read the following extract and answer the questions that follow: A liberal view behind the concept of organ and body donation is that after death our body should be useful to other needful persons so that their miserable life would become comfortable. Awareness about these concepts is increasing in our country and people are voluntarily donating their bodies. Life of many can be saved by organ and body donation. Blinds can regain their vision. Life of many people can be rendered comfortable by donation of organs like liver, kidneys, heart, heart valves, skin, etc. Similarly, · body can be made available for research in medical studies. Many government and social organizations are working towards increasing the awareness about body donation. What is the liberal view behind the organ and body donation?

Use your brain power : What is the correlation between the normal body temperature of humans which is 37^@C and the optimum temperature for the growth of microorganisms, 15^@C to 35^@C ?

(a) A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60 ^@ with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning. (b) Would your answer change, if the circular coil in were replaced by a planar coil of some irregular shape that encloses the same area? (All other particulars are also unaltered.)