Science Physics MCQ-186

General Science-Physics objective Quiz for UPPSC, CDS, UPSC, CivilsPrelims, NDA, SSC, DelhiPolice, RBI Exams



An observer moves towards a stationary plane mirror at a speed of 1 m/s. His image will move towards him at a speed of

 
 
 
 

An seen from the earth, which planet appears the brightest at night?

 
 
 
 

Angular displacement is

 
 
 
 

As the train starts moving, a man sitting inside leans backwards because of

 
 
 
 

Asteroids are a group of small objects revolving round the sun between the orbits of the planets

 
 
 
 

Astronauts in a capsule which is in a stable orbit around the earth are in ‘weightless’ condition. The reason for this is that

 
 
 
 

Astronomical distance are expressed in a unit called

 
 
 
 

At high altitudes, it is difficult to cook eggs or vegetables properly because of

 
 
 
 

Atmospheric pressure is measured by using an instrument called

 
 
 
 

Average density of the earth

 
 
 
 

Banking of curves is done to provide

 
 
 
 

Bats can fly in the dark because

 
 
 
 

Blue of the sky is due to

 
 
 
 

Bohr’s model for the hydrogen atom led to the conclusion that the radii of the stationary state orbits are

 
 
 
 

Both a Celsius and a Fahrenheit thermometer give the same reading at a particular temperature. What is that temperature?

 
 
 
 

Burns caused by steam are more severe than those caused by boiling water because

 
 
 
 

By what percentage should the pressure of a given mass of gas be increased so as to decrease its volume by 10% at a constant temperature?

 
 
 
 

By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?

 
 
 
 

A body of mass 2 kg moving with a velocity of 3 ms -1 collides head on with a body of mass 1 kg moving with a velocity of 4 ms -1 in the opposite direction. After collision, the two bodies stick together and move with a common velocity which in the units ms -1 is equal to

 
 
 
 

Two racing cars of masses m1 and m, are moving in circles of a radii r 1 and r 2 respectively. Their speeds are such that each make a complete circle in the same length of time t . The ratio of the angular speed of the first to the second car is

 
 
 
 

The velocity of a body depends on time according to the equation v = 20 + 1 f. The body is undergoing

 
 
 
 

1 A fly wheel is in the form of solid circular 1 wheel of mass 72 kg and radius of 5 m and I it takes 70 rpm then the energy of revolution

 
 
 
 

In a satellite, if the time of revolution is T, then KE is proportional to

 
 
 
 

The initial velocity of a particle is w(at t = 0) and the acceleration f is given by a.t. Which of the following relations is valid?

 
 
 
 

By which process do we get the heat from the sun, most of the space between the sun and the earth being vacuum?