Harsha told that Magnetic field lines are closed loops. But Krishna is not agreeing with Harsha. How Harsha will convince Krishna with an experiment ? What are the apparatus required ? How the experiment will be conducted ?

What do you conclude about magnetic field lines after conducting experiment with solenoid?

How can you verify with experiment."The magnetic field lines are closed loops"?

Aravind requires a concave mirror of focal length 10 cm for an experiment of light. He is having lot of concave mirrors in his lab without its focal length values. To determine the focal length of mirror in his laboratory, what are the apparatus required ? How focal length can be determined ?

How can you verify that a current carrying wire produces a magnetic field with the help of an experiment?

In the experiment conducted regarding "how earthworms get their food"what are the required things?

We have conducted experiment that proves the release of oxygen when photosynthesis happens ? i) What are the plants used for this experiment ? Where do they grow ? ii) How did you conduct the above experiment ? In which context are large number of air bubbles released? Did you notice?

Aravind plan to investigate how the light switch works? What process skills he need to conduct his experiment?

Following figure shows a metal rod PQ resting on the smooth ralls AH and positioned between the poles of a permanent magnet. The rails, the rod and the magnetic field are in three mutual perpendicular directions. A galvanometer G connects the rails through a switch K. Length of the rod 15 cm, B 0.50 T, resistance of the closed loop containing the rod 9.0 mOmega . Assume the field to be uniform. How much power is dissipated as heat in the closed circuit ? What is source of this power?

How do you verify experimentally that the current carrying conductor experiences a force when it is kept in magnetic field?