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Magnification produced by astronomical telescope for normal adjustment is $10$ and length of telescope is $1.1\text{m}$. The magnification when the image is formed at least distance of distinct vision is $(D=25\text{cm})$ ?

The size of the visible portion of Moon ___ after the New Moon.

A magnet always has ___ poles.

Identify the energy transformation taking place in the device shown below:

If a bar magnet was cut initially into two pieces. Then each of the new pieces was cut into two more pieces, and the process was repeated one more time, find out the number of the north poles generated?

When do we call an object to be tough?

Ram wants to make a magnet. Which one of these materials are NOT useful to him?

If the Earth and Moon move in the same plane around the Sun, then what phase of the Moon can we see on Earth?

Why do opaque objects cast a shadow, while transparent and translucent objects don't?

The best way to observe a solar eclipse is:

A train and a car start together from a point. The train's speed is 80 kmph and the car's speed is 60% of the train's speed. The train crosses a station every 15 minutes. How much distance will the car travel in the time the train takes to cross 3 stations? (Assume constant distance between consecutive stations)

1. 4

Identify the planet which appears reddish in color.

How can magnets lose their properties?

Differentiate between conventional and non-conventional sources energy.

Choose the odd one out.

Choose the correct option regarding gravitational force.

Magnetism is a type of

If the effort applied to lift the box is applied closer to the pivot, will it get harder or easier to lift the box?

The electricity produced by the flowing water is known as:

How can you convert iron strip into magnet?

When the south pole a magnet is brought near the nort pole of a freely suspended magnetic needle, it will_____.

One day you and your friends were discussing about matter. He believes that matter is continuous like a block. Initially, you have also agreed with him but later one observation changed your perception about matter. Now you believe it is made up of discrete particles. The observation was

Which of the following is not a fundamental unit?

Aditya came to know from his father that pole star is a very special star. In ancient times, it was one of the main indicators of direction at night. What is so special about this star?

Which of the following has more than one type of motion?

What is the difference between fundamental and derived quantities ?

Class III levers have mechanical advantage less than one. It cannot be used:

When sound waves travel from a rarer medium to a denser medium, its speed

What are the advantages of using a biomass fuel?

What can you comment on the objects in contact for them to experience frictional force?

A/an ______ of cloth has a length equal to the distance between the end of the outstretched arm and chin of a person.

In which of the following option(s) frictional force exists?

The picture below shows the changes in two states of matter. Identify the process 'X', by which gas is converted to liquid.