Explore topic-wise InterviewSolutions in .

1. 4

Water is filled up to a height h in a beaker of radius R. The density of water is $\rho$, the surface tension of water is T and the atmospheric pressure is $P_0$. Consider a vertical section ABCD of the water column through a diameter of the beaker. The force on water on one side of the section by water on the other side of this section has magnitude:

A body of mass $10kg$ is moving with a velocity of $4m{s}^{-1}$. Find the kinetic energy and momentum of the body respectively.

A car takes $4hours$ to travel from Bangalore to Chennai, whereas a flight takes only $30minutes$ to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is $400km$ and by air is $150km$, find the average speed of flight and the average speed of car respectively.

A perpendicular force is applied to a certain area and produces a pressure $P$. If the same force is applied to a twice bigger area, the new pressure on the surface is _______.

A bus decreases its speed from $80kmph$ to $60kmph$ in 5 seconds. Find the acceleration of the bus.

Humans have eyes to see and catch but bats cannot see, then how do they catch their prey?

Choose the correct option:

$\begin{array}{cccc}1.& \text{Tone}& i.& \text{frequencies that are integral multiple of fundamental frequency.}\\ 2.& \text{Note}& ii.& \text{sound of single frequency.}\\ 3.& \text{Overtone}& iii.& \text{sound of multiple frequencies.}\\ 4.& \text{Harmonic}& iv.& \text{higher frequencies other than fundamental frequency.}\end{array}$

1. 1.11

A student lowers a body in a liquid filled in a container. He finds that there is a maximum apparent loss in weight of the body when

Choose the correct option:

$$\begin{array}{cccc}1.& \text{Tone}& \text{i}.& \text{frequencies that are integral multiple of fundamental frequency.}\\ 2.& \text{Note}& \text{ii}.& \text{sound of single frequency.}\\ 3.& \text{Overtone}& \text{iii}.& \text{sound of multiple frequencies.}\\ 4.& \text{Harmonic}& \text{iv}& \text{higher frequencies other than fundamental frequency.}\end{array}$$

What is momentum?

What expression gives the restoring force, F acting on a cylinder floating vertically in a liquid of density,σ (Motion being simple harmonic)? Given mass, length, area of cross section of cylinder is m, l, A respectively.

The adjoining diagram shows three soap bubbles A, B and C prepared by blowing the capillary tube fitted with stop cocks, $S_1$,$S_2$ and $S_3$. With stop cock S closed and stop cocks $S_1$, $S_2$ and $S_3$ opened

[CPMT 1988]

Upthrust on a body is equal to ___.

An object weighs 10 N in air. When immersed fully in a liquid, it weighs only 8 N. The weight of liquid displaced by the object will be :
(a) 2 N
(b) 8 N
(c) 10 N
(d) 12 N

What is the magnitude of the gravitational force between the earth and 1kg object on its surface

Why does a coin placed on a card, drop into the tumbler when the card is rapidly flicked with the finger?

Given below in the left column are different modes of communication using the kinds of waves given in the right column.

$\begin{array}{cccc}\text{A.}& \text{Optical Fibre Communication}& \text{P.}& \text{Ultrasound}\\ \text{B.}& \text{Radar}& \text{Q.}& \text{Infrared Light}\\ \text{C.}& \text{Sonar}& \text{R.}& \text{Microwaves}\\ \text{D.}& \text{Mobile Phones}& \text{S.}& \text{Radio Waves}\end{array}$



From the options given below, find the most appropriate match between entries in the left and the right column.

According to the third law of motion when we push on an object, the object pushes back on us with an equal and opposite force. If the object is massive truck parked along the roadside, it will probably not move. A student justifies this by answering that the two opposite and equal forces cancel each other. Comment on this logic and explain why the truck does not move.

If the radius of cross-section of the conductor is increased by 0.1% keeping volume constant, what is the percentage change in the resistance of the conductor?

A force acting on a body produces a constant acceleration. The equation written is as follows:

$F=Km\times \frac{(V-U)}{t}$

F- Force; K-constant;

m- mass; V- final velocity

U- initial velocity; t- time taken

a- acceleration; P- momentum

The equation can also be written as___ .

Draw the velocity-time graph for a particle which starts from rest and moves with uniform acceleration along a straight line.

A body has an initial velocity 5 $m{s}^{-1}$. It is accelerating at 2 $m{s}^{-2}$. It's velocity after 10 second is

Determine the magnetic flux passing through the rectangular sheet of dimensions $0.2\text{m}\times 0.4\text{m}$ when it is held at right angles to a uniform magnetic field of strength $2.5\text{T}$.

According to Galileo's thought experiment, which of the following situations is correct if there is no friction on the surface?

Is it possible to calculate an acceleration for a body which starts from rest and achieves a certain speed in the given time frame?

Which of the following measures small length to highest accuracy?

Among these two scenarios, identify the action and reaction forces.

Scenario 1$:$ A person is pushing a book on the table.

Scenario 2$:$ A bullet is fired from a gun.

Then match the following.

$$\begin{array}{cc}Coloumn-A& Coloumn-B\\ 1.Actionforce& \left(a\right)Forceappliedbythebookontheboy\\ 2.Reactionforce& \left(b\right)Forceappliedbytheboyonthebook\\ & \left(c\right)Recoilforceonthegun\\ & \left(d\right)Acceleratingforceonthebullet\end{array}$$

(a) Is the acceleration due to gravity of earth 'g' a constant? Discuss.
(b) Calculate the acceleration due to gravity on the surface of a satellite having a mass of $7.4\times {10}^{22}$ kg and a radius of $1.74\times {10}^{6}m(G=6.7\times {10}^{-11}N{m}^2/k{g}^2)$. Which satellite do you think it could be?

Question 130(ii)

Investigating Solar System The table shows the average distance from each planet in our solar system to the Sun.

$\begin{array}{ccc}Planet& DistancefromSun\left(km\right)& DistancefromSun\left(km\right)StandardNotation\\ Earth& 149600000& 1.496\times {10}^8\\ Jupiter& 778300000& \\ Mars& 227900000& \\ Mercury& 57900000& \\ Neptune& 4497000000& \\ Pluto& 5900000000& \\ Saturn& 1427000000& \\ Uranus& 2870000000& \\ Venus& 108200000& \end{array}$

Order the planets from closest to the Sun to farthest from teh Sun.