Suppose you have three concave mirrors A, B and C of focal length 10 cm, 15 cm and 20 cm. For eachconcave mirror you perform the experiment of image formation for three values of object distance of 10cm, 20 cm and 30 cm. Giving reason answer the following:(a) For the three object distances, identify the mirror/mirrors which will form an image of magnification-1.(b) Out of the three mirrors identify the mirror which would be preferred to be used for shavingpurposes/makeup.(c) For the mirror B, draw ray diagram for image formation for object distances 10 cm and 20 cm

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

An isolated conducting spherical shell carries a positive charge. part a which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? electric potential inside the shell is constant and outside the shell is changing as 1/r2 both the electric potential and the electric field does change with r inside and outside the spherical shell electric potential inside and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is equal to zero electric field inside and outside the shell is constant (does not change with the position r), but is not equal to zero electric field inside and outside the shell is changing as 1/r (where r is the distance from the center of the sphere) electric field inside is equal to zero and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is changing as 1/r electric field inside and outside the shell is changing as 1/r2 electric field inside is equal to zero and outside the shell is changing as 1/r2 electric field inside and outside the shell is zero electric field inside is constant and outside the shell is changing as 1/r

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.