In compound microscope, the objective have focal length than eye-piece:
Smaller
Larger
Equal
Equal and larger
for which of following ampere second could be the unit:
energy
current
charge
power
Totally reflecting prism is used in:
Periscope
Binoculars
Periscope and binocular
Telescope
Information storage device work on the principles of:
Heat
Sound
Light
Magnetism
To protect the gold leaves of electroscope from the external electric disturbances, the aluminum foil is grounded by a thin wire, which is made up of:
Aluminum
Silver
Copper
Brass