Choose the correct statement with respect to Refraction of light.

When a light ray enters from one optical medium to another and bends towards the normal then,

Identify the lens which exhibits the following characteristics of image virtual, erect and diminished

A coin is dropped in a glass through containing benzene filled to a depth of 4cm. When viewed from the outside it appears to be raised by 2cm. The refractive index of benzene with respect to air is calculated as

Two basic forms of mechanical energy are:

1 kilowatt hour is equal to

Ram and Shyam each of mass 45kg reach the fourth floor of a building in time 4 sec and 5 sec. The respectively ratio of their inertia is:

The kinetic energy of body becomes one third when

A boy drawing water from a well by means of bucket through a height of 15 m. If the volume of bucket is 2 litre. [ g= 10Nkg ^-1]. The mass of water lifted is:

A boy drawing water from a well by means of bucket through a height of 15 m. If the volume of bucket is 2 litre. [ g= 10Nkg ^-1]. The mechanical energy possessed by the bucket at height of 7.5m is 

A boy drawing water from a well by means of bucket through a height of 15 m. If the volume of bucket is 2 litre. [ g= 10Nkg ^-1]. The total energy when the empty bucket of mass 500g is falling freely under gravity at a height of 5m from the surface of water is

A boy drawing water from a well by means of bucket through a height of 15 m. If the volume of bucket is 2 litre. [ g= 10Nkg ^-1]. What is the mass of water collected by the boy after 20 rounds of the bucket been dropped inside the well

The relationship to evaluate the efficiency is

State which of the following statements are true.

In case of cranes and hoist the velocity ratio is

A sprinter covers a distance of 2(pi)r while running across the joggers track of circumference 44 cm.. Find the work done by the sprinter if the distance travelled by him is 1.76 x 10^-3km

If the wave velocity of sound in air is 336 ms^-1  then the minimum distance for echo to occur is

Select the correct reason why diamond appears to sparkle in the dark

The energy transformation taking place in an electric fan is

A girl sitting on a swing and a boy having the same mass as the girl swings to the same height as that of the girl. Which of the statements are correct pertaining to the boy and girl

The measure of angular deviation for a particular colour of light while passing through a glass prism is called:

Choose the correct statement with respect to critical angle

Optical illusion seen in deserts is called as

Identify the type of lens used in case of a magnifying glass.

1 N-m is equal to

Greater the perpendicular distance of point of application of force

In an ideal machine

For a practical machine

Mechanical advantage of pulley systems used in lifts of buildings is

Sachin Tendulkar starts the innings by batting the very first ball and returns back to the batting end on completion of his run and a blazing double run during the match v/s the world champions Australia. Work done by him is

A guitarist plucks a string of frequency 512 Hz during an orchestra. If speed of sound in air is 320ms^-1, then the wavelength of sound produced is:

A guitarist plucks a string of frequency 512 Hz during an orchestra. If speed of sound in air is 320ms^-1, then time taken by one vibration is:

A guitarist plucks a string of frequency 512 Hz during an orchestra. Speed of sound in air is 320ms^-1. If the same sound was produced in a medium where velocity of sound is: 420 ms^-1, its frequency would be

A guitarist plucks a string of frequency 512 Hz during an orchestra. Speed of sound in air is 320ms^-1. The corresponding time period in case 3 would be

The diamond has maximum refractive index then it’s critical angle will be

 In total internal reflection

Mirage in desert and on road .which of following physical phenomenon are responsible for this.

which ray is less deviated by prism

The sum of potential energy and kinetic energy of a molecule is called

The internal energy of cold body

The amount of  heat energy Contained in body depend on

The amount of heat energy required to  raise the temperatures of body by 1K is

The smaller  unit of heat is

The correct formula of  heat capacity is