science important question for class 10 final exam 2020

Aditya Raj Anand

Friday, 14 February 2020

science class 10

science important question for class 10 final exam 2020

collection of all science important question for class 10 final exam 2020 cbse final, science important question chapter wise all physics, chemistry, biology. it is very important science question. it can be asked in your final board exam 2020 CBSE.
If you can do all the question then you have a potential to score good marks because there is a science chapter wise question and all the question is just a basic and taken to the chapter so if any on can do all the below question then they are ready to give science exam. 

science important question for class 10 physics chapter wise

Electricity

1. How much work is done when one coulomb charge moves against a potential difference of 12 V ?
2. The atom of copper contain electrons and the atom of rubber also contain electrons then why does copper conduct electricity but rubber does not conduct electricity?
3. What is the potential difference between the terminals of a battery if 250 J of work is required to transfer 20 C of charge from one terminal of battery to the other?
4. Calculate the number of electron consisting of one coulomb of charge?
5. How much work is done in a charge of 2 C from a point at 118 V to a point at 128 V ?
6. How much energy is transferred by a 12 V power supply to each coulomb of charge which it moves around a circuit?
7. What is a voltmeter? How is a voltmeter is connected in the circuit to measure the potential difference between two points? Explain with the help of a diagram.
8. State the relation between potential difference, work done, and charge moved.
9. What do understand by the term electric potential, at a point?
10. What is the unit unit of electric potential?

Magnetic Effect of Electric Current

1. state any two properties of magnetic field lines.
2. Draw a diagram to show the magnetic field lines around a bar magnet.
3. State and explain maxwell's right hand thumb rule.
4. What is maxwell's corkscrew rule? For what purpose it used?
5. Draw the magnetic lines of force due to a circular wire carrying current.
6. A current carrying conductor is placed perpendicularly in a magnetic field. Name the rule which can be used to find the direction of force acting on the conductor.
7. draw the labelled diagram of A.c generator. with the help of this diagram, explain the construction and working of an A.c generator.
8. What is the frequency of A.c supply in India?
9. Two circular coils A and B are placed close to each other. if the current in coil A is changed, will some current be induced in the coil B? Give reason for your answer.
10. Explain the principle of an electric generator.

Source of Energy

1. Define ignition temperature of a fuel.
2. What is a source of energy?
3. What are the two main categories of the source of energy?
4. What are the characteristic of an ideal fuel?
5. Why is LPG consider a good fuel?
6. Why is the leakage of LPG detected easily although it is odourless?
7. State the step to be taken in case its leakage is detected in the kitchen.
8. With the help of a level diagram explain the construction and working of a solar cooker.
9. What are the advantage or disadvantage of using of solar cooker?
10. In many application, solar cell are connected to rechargeable batteries. Why is this show?

Reflection of light science important question class 10

1. A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. What will be the angle of reflection?
2. What is spherical mirror? distinguish between a concave mirror and a convex mirror.
3. If the focal length of a convex mirror is 25 cm what is its radius of carvature?
4. Briefly describe how you would find the focal length of a concave mirror quickly but approximately.
5. Describe the new cartesian sign convention used in optics. Draw a level diagram to illustrate this sign convention.
6. A concave mirror produces three times magnified real image of an object placed at 10 cm in front of it. where is the image located?
7. A concave mirror produces a real image 1 cm tall of an object 2.5 mm tall placed 5 cm from the mirror. find the position of the image and the focal length of the mirror.
8. If an object of 10 cm height is placed at the distance of 36 cm from a concave mirror of focal length 12 cm, find the position, nature and height of the image.
9. Why does a driver prefer to  use a convex as a rear view mirror in a vehicle?
10. What is meant by reflection of light? draw a level diagram to show the reflection of light.

The human eye science important question

1. What kind of lens is present in the human eye?
2. Why is normal eye is not able to see clearly the object placed at the 25 cm?
3. The near point of a hypermetropic eye is 1 m. what is nature and power of the lens required to correct this defect?
4. What are the advantage of having two eyes instead of just one?
5. A ray of white light breaks up into its components while passing through a glass prism.
6. Draw a diagram to show how white light can be dispersed into spectrum by using a glass prism. mark the various color of the spectrum.
7. What is meant by dispersion of white light? Describe the formation of rainbow in the sky with the help of a diagram.
8. Why do stars seem higher than they actually are? illustrate your answer with the help of a diagram.
9. What is atmospheric refraction? what cause atmospheric refraction?
10. Name the phenomenon which causes the twinkling of stars.

Chemistry chapter wise important question 2020 final exam science