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Harish was asked to identify a piece of soft iron put in a basket of 10 magnets of the same shape and size. Which is the easiest way of identifying the iron piece at the earliest?

Question 22

Identify the names of six natural phenomena from the following word diagram.

The motion of particles (molecules) of gas between two successive collisions is an example of

Choose the correct option.

What is the equivalent temperature of 0 degree Celsius in Fahrenheit scale?

Incident ray is defined as:

Geothermal energy can be renamed or related as

What is Negative Velocity?

Ever wonder when you look at things in the surrounding, what are they made up of? No? Everything in your surrounding including you, are made up of atoms. Now what is an atom? Atom is made up of electrons, protons and neutrons. Electrons revolve around the protons and neutrons. Protons are positively charged and electrons are negatively charged while neutrons have no charge. Protons are not free to move, hence only electrons can move if we provide them enough energy. The particle which is responsible for the heating of appliances is ______.

Which of the following do not undergo significant expansion or contraction with the change in their temperature?

Select the correct statement with respect to the given figure.

How is sea breeze caused?

What is the difference between magnetic and non-magnetic materials? Give examples.

Choose the correct option according to the angle $\theta$ between force and direction of displacement.

$$\begin{array}{cc}Coloumn1& Coloumn2\\ 1.\theta iszero& i)Workdoneisalwayszero\\ 2.\theta islessthan{90}^0& ii)Workdoneisnon-negative\\ 3.\theta isgreaterthan{90}^0& iii)Workdoneisalwayspositive\\ 4.\theta is{90}^0& iv)Workdoneisneverpositive\end{array}$$

A disc in which seven rainbow colours equally spread over an area, which on rotation, fades to white colour is called:

A child moving down a slide has which form of energy?

An ox is tied to a pole situated at the centre of a field, with a 10 m long rope. The ox moves keeping the rope tight. Find the area of the ground swept by the rope. (Use π = 3.14)

A spool is pulled horizontally on a rough surface by two equal and opposite forces as shown in the figure. Which of the following statements is correct?

An elastic spring of force constant k is compressed by an amount x. Then its potential energy will be

Spreading of fragrance of a burning incense stick in a room shows that:

Six identical conducting rods are joined as shown in figure. Points A and D are maintained at temperatures 200${}^{\circ }$C and 20 ${}^{\circ }$ C respectively. Find the temperature of junction B.

Which of the following objects make use of an electromagnet?

What can be said about the diagram given below?

With the increase in kinetic energy of the air molecules, the tendency to occupy space by those air molecules will _____________.

Convert ${77}^{\circ }F$ to ${}^{\circ }C$.

Select the correct option:

I) A magnetic needle responds to the Earth’s magnetic field.

II) A magnetic needle gets deflected when a magnet is brought near it.

III) A magnetic needle is made up of a non-magnetic material.

The motion of the drill head that is being used to make a hole in a wooden plank is an example of:

Two boys were playing with a ball on a level ground. Boy $A$ throws the ball on the third floor of the building, which is at a height of $5m$. Furthermore, boy $B$ manages to throw the ball on fourth floor, which is at a height of $7m$ from the level ground. The ratio of the work done by boy $A$ and boy $B$ is?

Question 1

When an electric current flows through a copper wire AB as shown in Figure, the wire

(a) Deflects a magnetic needle placed near it

(b) Becomes red hot

(c) Gives electric shock

(d) Behaves like a fuse

A 6-foot tall man is standing in front of 3-feet of mirror (positioned properly) in order to view his entire image.If he moves back 2 feet from the mirror then

Thermal expansion is the property by virtue of which, an object changes its ___ with the increase in its temperature.

Suggest two methods to find out winds direction at a given place ?

Conduction current

What is an electromagnet? Give two methods by which we can increase the strength of magnetic field produced by a circular coil carrying current? [4 MARKS]

In case you lost your way, which of the following would you choose to find the direction?

The Global Assessment Report on Disaster Risk Reduction is prepared by

Code:

How long will it take to drive 480 miles if you are driving at a speed of 60 miles per hour?

Question 2
You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

The potential difference is created in an electric circuit due to:

The time period of a sound wave is $0.020s$. What is the frequency of vibration?

The perimeter of a rhombus is 20 cm & its height is 3.5 cm. Find its area.

Which of the following is the symbol of inductor?

What are four methods to prevent rusting?

Assuming that the flight travels in a straight line from Chennai to Bangalore, the shortest distance between Chennai and Bangalore is 150 km.
A car takes 4hrs to travel from Bangalore to Chennai whereas the flight takes only 30min to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is 400km and the air is 150km. Calculate the average speed and average velocity of flight and car.

Answer in the given order (in $\frac{km}{hr}$ ):

Find the Average Speed of Flight, Average velocity of Flight, Average speed of car, Average velocity of car.

Does a cyclone originates only above oceans