Refractive index has a unit.

• True

• False

Wave in which the medium move perpendicularly as the direction of the wave is longitudinal wave.

• True

• False

ms = 1000s

• True

• False

During the charging by friction the electrons are created

• True

• False

• Sometimes

Which is not a characteristic of real images?

• Highly enlarged

• Either inverted or upright

• Closer to the mirror than the object is

Why do you see the t-shirt white?

• No color is reflected

• white color is reflected

• 7 mixture color are reflected

Gas forms 78% in the atmosphere

• Neon

• Nitrogen

• Oxygen

• Carbon dioxide

Cell is a collection of batteries

• True

• False

When we remove bulb from parallel circuit the total resistance decreases.

• True

• False

“Causes displacement of people from large areas of land” is disadvantage of Biomass

• True

• False