Physics Gk interview questions

The Helio Centric theory is given by

1. Copernicus
2. Tycobrahe
3. Pluto
4. Johnkepler

X2 = ky. This is the equation of a

1. Square
2. Circle
3. Parabola
4. Ellipse

Kepler’s first law of planetary motion is also called

1. Law of distances
2. Law of areas
3. Law of periods
4. Law of orbits

The centripetal force around the circular path depends upon

1. Energy
2. Impulse
3. Speed
4. Pressure

The molecular range is of the order of

1. 10-8 cm
2. 10-8 m
3. 10-6 cm
4. 10-6 m

A rocket is not a projectile until its

1. Energy is wasted
2. Energy is saved
3. Propellant fuel is not burnt
4. Propellant fuel is burnt

The geocentric theory is given by

1. Aristotle
2. Newton
3. Prout
4. Ptolemy

The angle of projection for a projectile to cover maximum range is

1. 0°
2. 30°
3. 45°
4. 60°

The air resistance on freely failing body depends upon

1. Friction
2. Shape
3. Pressure
4. Density

The centripetal force required for a car to bicyle to go round a circular curve depends on

1. The angle of elevation of the curved track
2. Speed of the vehicle only
3. The radius of curvature of the path only
4. Speed and the radius of curvature of the curve

The force between a satellite and the earth which acts as a centripetal force keeping the satellite in orbit is

1. Gravitational force
2. Cohesive force
3. Adhesive force
4. Molecular force

A bullet shot from a rifle is an example of

1. Law of conservation of energy
2. Einstein mass energy equation
3. Newton’s second law
4. Projectile

The relation between time of ascent and time of descent in the case of bodies moving under gravity is

1. Time of ascent is more than the time of descent.
2. Time of ascent is less than the time of descent.
3. Time of ascent and time of descent will never be equal.
4. Time of ascent is equal to the time of descent.

The unit of angular velocity its

1. cms-1
2. rad s-2
3. m s-1
4. rad s-1

The time period of Jupiter is

1. 5 years
2. 12 years
3. 11.862 years
4. 30 years

The unit of surface tension is

1. Nm-2
2. Kg m-1
3. N-1 m
4. Nm-1

The principle used in the centrifuges is

1. Force
2. Gravitational force
3. Centripetal force
4. Centrifugal force

Rain drops assume spherical shape due to

1. Centripetal force
2. Surface tension
3. Centrifugal force
4. Gravitational force

The formula to calculate centripetal force is

1. F = ma
2. F = mg
3. F = mv2/r
4. F = mv/r2

Major share of electricity generated in India is through _____

1. Gas turbine power plants
2. Thermal power plants
3. Nuclear power plants
4. Hydro-electric plants

The energy produced at a cheaper cost is

1. Wind energy
2. Hydro electric energy
3. Nuclear energy
4. Solar energy

The period of a vibrating body of frequency 100 Hz is

1. 10 second
2. 0.01 second
3. 0.1 second
4. 100 second

Boiling point of impure substance is usually

1. Greater than that of pure substance
2. Less than that of pure substance
3. Equal to that of pure substance
4. None of the above

Reaction used in controlling acidity of stomach is

1. Dehydration
2. Reduction
3. Oxidation
4. Neutralization

When a body is thrown upwards, its velocity

1. attains maximum value
2. remains constant
3. Decreases
4. Increases

Rusting of iron is

1. Dehydration
2. Oxidation
3. Reduction
4. Displacement

Rusting of iron requires

1. Nitrogen
2. Oxygen and water
3. Oxygen
4. Water

In simple machines, the mechanical advantage is equal to

1. Load/power
2. Power/load
3. Load x power
4. None of these

Electron is

1. Present in the nucleus
2. Sub-atomic particle
3. Positively charged
4. Neutral

The unit of thrust is

1. Newton
2. Pascal
3. Kg m
4. Joule