Holi vacation assignment grade 9 (English/Math/Science)

 

English Passage

The Value of Discipline

Discipline is an essential quality for achieving success in life. It means following rules, managing time wisely, and maintaining self-control. A disciplined person completes tasks on time and stays focused on goals despite difficulties.

In school life, discipline helps students develop good study habits and respect for teachers and classmates. It teaches responsibility and improves decision-making skills. Athletes, scientists, and successful leaders often credit discipline as the key to their achievements.

Discipline does not mean strict punishment; rather, it is about developing positive habits through regular practice and determination. When individuals learn to control their actions and emotions, they become more confident and capable of handling challenges. Thus, discipline plays a vital role in personal growth and success.

Questions

1.     What is discipline?

2.     How does discipline help students in school?

3.     Name two qualities of a disciplined person.

4.     Why is discipline important for success?

5.     Does discipline only mean punishment? Explain briefly.

Ratio, Fraction, and Percentage (Math)

1.     Divide Rs. 5400 among A, B, and C in the ratio 2 : 3 : 4.

2.     Convert 7/20 into a percentage.

3.     A number is increased from 80 to 100. Find the percentage increase.

4.     Simplify the ratio 0.6 : 1.2.

5.     Find 15% of 640.

6.     If the ratio of length to breadth of a rectangle is 5 : 3 and the length is 25 cm, find the breadth.

7.     A student scored 72% marks out of 500. How many marks did the student obtain?

8.     Express 125% as a fraction and decimal.

9.     The price of a book decreases from Rs. 400 to Rs. 340. Find the percentage decrease.

10.  Solve: 3/4 ÷ 1/2.

Electricity and Magnetism (Science)

Electricity and magnetism are fundamental branches of physics that together form the concept of electromagnetism, which explains many natural phenomena and modern technologies. Electricity is the flow of electric charge, mainly carried by electrons in a conductor. The rate of flow of electric charge is called electric current, measured in amperes (A). Electric current flows through a closed circuit powered by a source such as a battery or generator.

The opposition to the flow of electric current in a material is called resistance, measured in ohms (Ω). The relationship between voltage, current, and resistance is explained by Ohm’s Law, which states that current is directly proportional to voltage and inversely proportional to resistance (V = IR). Conductors like copper have low resistance, while insulators such as rubber have very high resistance.

Magnetism is produced by moving electric charges. A magnet creates a magnetic field around it, and magnetic field lines show the direction and strength of magnetic force. When electric current passes through a wire, it generates a magnetic field around the conductor. This discovery led to the development of electromagnets.

An electromagnet is formed by passing electric current through a coil of wire, often wrapped around an iron core to increase strength. Electromagnets are important in devices such as electric motors, generators, transformers, and relays. Electric motors convert electrical energy into mechanical energy, while generators convert mechanical energy into electrical energy.

The study of electricity and magnetism helps us understand power generation, electrical safety, and the working principles of many household and industrial machines.

Questions

  1. Define electric current and state its unit.
  2. What is resistance, and what is its unit?
  3. State Ohm’s Law.
  4. How is a magnetic field produced around a conductor?
  5. Name two devices that work using electromagnetism.

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