An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?
A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?
A.
the magnet is moved towards the stationary solenoid
B.
there is no relative motion
C.
the magnet is moved away from the stationary solenoid
D.
the solenoid is moved away from the stationary magnet
