Physics

The instrument that measures and records the relative humidity of air is?

• Hygrometer

• Lactometer

• Barometer

• Hudrometer

Which combination of colour the most convenient during day and night time?

• Orange

• Blue and orange

• Red and green

• Yellow and black

• Green and red

The shape of our milky way galaxy is

• Circular

• Elliptical

• Spiral

• None of the above

The different colours of different stars are due to the variation of

• Pressure

• Density

• Temperature

• None of the above

• Radiation from them

Woolen clothes keep the body warm because

• Wool increases the temperature of the body

• Wool is a bad conductor

• Wool absorbs radiant heat from outer objects

• Wool rejects heat from the outer objects

While catching a ball,a player pulls down his hands to lower the

• Force

• Moment

• Impulse

• Catching time

• Equilibrium

Instrument used to measure the force and velocity of the wind is

• Altimeter

• Audiometer

• Anemometer

• Ammeter

• Barometer

The fundamental scientific principle in the operation of battery is

• Acid-base

• Interaction

• Dialysis

• Dissociation of electrolytes

• Oxidation-reduction

Equilibrium is a condition that can

• Change only if some outside factor changes

• Never change

• Change only if some internal factor changes

• Change only if some government factor changes

If the length of a simple peadulum is halved then its period of oscillation is

• Doubled

• Halved

• Increased by a factor

• Decreased by a factor