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3301.

It is advised that India should pursue research and development on thorium instead of Uranium as the future fuel of nuclear energy. What advantages does the thorium hold over uranium?

Answer»

It is advised that India should pursue research and development on thorium instead of Uranium as the future fuel of nuclear energy. What advantages does the thorium hold over uranium?


3302.

Calculate the effort arm of a lever in which the mechanical advantage is 4 and the load arm is 90 cm.

Answer»

Calculate the effort arm of a lever in which the mechanical advantage is 4 and the load arm is 90 cm.


3303.

If we start observing earth from 1st January 2001, then how many revolutions has the earth made until 1st January 2005?

Answer»

If we start observing earth from 1st January 2001, then how many revolutions has the earth made until 1st January 2005?


3304.

Question 19 A bar magnet is cut into two pieces A and B, from the middle, as shown in Fig. Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer.

Answer»

Question 19

A bar magnet is cut into two pieces A and B, from the middle, as shown in Fig.

Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer.

3305.

In which of the following cases least force is required to lift the block?

Answer»

In which of the following cases least force is required to lift the block?


3306.

Which of the following is a luminous object?

Answer»

Which of the following is a luminous object?


3307.

Calculate the mechanical advantage of a lever whose effort arm is 50 cm and the load arm is 2 cm.

Answer»

Calculate the mechanical advantage of a lever whose effort arm is 50 cm and the load arm is 2 cm.


3308.

Which of the following is/are the examples of conventional sources of energy?

Answer»

Which of the following is/are the examples of conventional sources of energy?


3309.

The tides are formed due to:

Answer»

The tides are formed due to:


3310.

Discuss the significance of measurement. Give examples where you use measurements.

Answer»

Discuss the significance of measurement. Give examples where you use measurements.

3311.

What happens to the volume of a solution when sugar is dissolved in it?

Answer»

What happens to the volume of a solution when sugar is dissolved in it?


3312.

A pencil is placed next to a ruler such that the ends of the pencil are at 6.2 cm and 13.9 cm markings on the ruler. What is the length of this pencil?

Answer»

A pencil is placed next to a ruler such that the ends of the pencil are at 6.2 cm and 13.9 cm markings on the ruler. What is the length of this pencil?

3313.

In a second order lever:

Answer»

In a second order lever:


3314.

A ray has

Answer»

A ray has


3315.

Why does the freely suspended bar magnet always points to the north and south direction

Answer» Why does the freely suspended bar magnet always points to the north and south direction
3316.

What do electricians use to test circuits and what is continuity test?

Answer»

What do electricians use to test circuits and what is continuity test?

3317.

Define the mechanical advantage of an inclined plane.

Answer»

Define the mechanical advantage of an inclined plane.


3318.

The farthest bright galaxies that modern telescopes are capable of seeing are up to

Answer»

The farthest bright galaxies that modern telescopes are capable of seeing are up to


3319.

How long does a moon approximately take to complete a cycle?

Answer»

How long does a moon approximately take to complete a cycle?


3320.

With the help of which constellation can we locate the pole star?

Answer»

With the help of which constellation can we locate the pole star?


3321.

The rays coming out of the bulb are called_________

Answer»

The rays coming out of the bulb are called_________


3322.

Which of the following is/are examples of living things which emit light?

Answer»

Which of the following is/are examples of living things which emit light?


3323.

When the distance between the object and the source of light is decreases

Answer»

When the distance between the object and the source of light is decreases

3324.

Why Pendulum is not used for measuring time.

Answer»

Why Pendulum is not used for measuring time.

3325.

What is insulator & conductor

Answer»

What is insulator & conductor

3326.

_______ of a rigid object may vary due to the applied force.

Answer»

_______ of a rigid object may vary due to the applied force.


3327.

A man moves at a speed of 5 kmph for 20 min and goes back the same distance at a speed of 25 kmph. How much time does it take to go back? (in minutes)4

Answer» A man moves at a speed of 5 kmph for 20 min and goes back the same distance at a speed of 25 kmph. How much time does it take to go back? (in minutes)
  1. 4
3328.

Distinguish between Star and Satellite.

Answer» Distinguish between Star and Satellite.
3329.

Although an incense stick is placed far away from Rahul, he is still able to smell its pleasant odor. This phenomenon demonstrates which one of the following characteristics of matter?

Answer»

Although an incense stick is placed far away from Rahul, he is still able to smell its pleasant odor. This phenomenon demonstrates which one of the following characteristics of matter?


3330.

The length of a rectangle is 10 cm and breadth is 7 cm. What will be the area of a rectangle formed by joining 12 of these rectangles?

Answer»

The length of a rectangle is 10 cm and breadth is 7 cm. What will be the area of a rectangle formed by joining 12 of these rectangles?

3331.

What is a star? What is a celestial object?

Answer»

What is a star? What is a celestial object?

3332.

When a magnet is suspended, it always aligns itself in the _____ direction.

Answer»

When a magnet is suspended, it always aligns itself in the _____ direction.


3333.

If a bar magnet is cut into two pieces then each piece will _________.

Answer»

If a bar magnet is cut into two pieces then each piece will _________.


3334.

Vijay is pulling a block with 22 N force and Gopal is pulling it with 10 N force in opposite direction. Vijay is able to pull the block towards himself for a total distance of 6.5 m. Find the net work done.

Answer»

Vijay is pulling a block with 22 N force and Gopal is pulling it with 10 N force in opposite direction. Vijay is able to pull the block towards himself for a total distance of 6.5 m. Find the net work done.


3335.

Why are vehicle tyres treaded?

Answer»

Why are vehicle tyres treaded?


3336.

What is the difference between circular and rotatory motion?

Answer»

What is the difference between circular and rotatory motion?

3337.

Repeated to and fro motion of an object from a fixed point is known as ___ motion.

Answer» Repeated to and fro motion of an object from a fixed point is known as ___ motion.
3338.

What are electrostatic forces?

Answer»

What are electrostatic forces?


3339.

The temperature on the Kelvin scale reads 40 K. What will be the value on the Celsius scale?

Answer»

The temperature on the Kelvin scale reads 40 K. What will be the value on the Celsius scale?


3340.

Difference between beam balance and electronic balance

Answer»

Difference between beam balance and electronic balance

3341.

Materials which do not allow electric current to flow through them is known as ___ .

Answer»

Materials which do not allow electric current to flow through them is known as ___ .

3342.

Which of the following is an example of contact force?

Answer»

Which of the following is an example of contact force?


3343.

Which of the following object is necessary for the formation of a shadow?

Answer»

Which of the following object is necessary for the formation of a shadow?


3344.

Which of the following is/are required to measure the length accurately?

Answer»

Which of the following is/are required to measure the length accurately?


3345.

what is the other name for a switch

Answer» what is the other name for a switch
3346.

Define battery

Answer» Define battery
3347.

2 m=cm.

Answer» 2 m=cm.
3348.

If a body moves for the first 2 hours with a speed of 20 km/h and another one hour with a speed of 30 km/h, then the total distance travelled by the body is:

Answer»

If a body moves for the first 2 hours with a speed of 20 km/h and another one hour with a speed of 30 km/h, then the total distance travelled by the body is:


3349.

SI unit of both ______ and ______ is joule.

Answer» SI unit of both ______ and ______ is joule.
3350.

Select the appropriate articles for the blanks. ___ bird flew over my head with such speed that it felt like a bullet just missed me by inches.

Answer»

Select the appropriate articles for the blanks.

___ bird flew over my head with such speed that it felt like a bullet just missed me by inches.