SANT NIRANKARI PUBLIC SCHOOL WEEK 1 (Assignment) …WEEK 1 (Assignment) Subject : Physics Assignment 1 1 The force acting between two point charges q1 and q2 kept at some distance

SANT NIRANKARI PUBLIC SCHOOL

WEEK 1 (Assignment)

Subject : Physics

Assignment 1

1 The force acting between two point charges q1 and q2 kept at some distance

apart in air is attractive or repulsive when (a) q1q2 < 0 and (b) q1q2 > 0 .

2 Two equal balls having equal positive charge q coulomb are suspended by

two insulating strings of equal length. What would be the effect on the force

when a plastic sheet is inserted between the two?

3 The sum two point charges is 7µC. They repel each other with a force of 1N

when kept 30cm apart in free space. Calculate the value of each charge.

4 A proton and electron are placed 1.6 cm apart in free space. Find the

magnitude of electrostatic force between them. What is the nature of this

force

5 calculate the coulomb force between two α-particles separated by a distance

of 3.2x10-15m.

6 The electrostatic force between the charges of 200µC and 500µC placed in free space is 5gf. Find the distance between the two charges. Take g=10m/s2 .

7 Two equal charges are placed at a separation of 1m. What should be the magnitude of the charges so that the force between them equals the weight of a 50kg person?

8 How far apart two protons are if the electrostatic force exerted by one on the other is equal to the weight of an electron?

Subject : Physics

Assignment 2

1. Compare the strength of electrostatic and gravitational forces by determining the ratio of their magnitudes (a) for an electron and a proton (b) for two protons.

2. Estimate the accelerations for electron and proton due to electrical force of their mutual attraction when they are 1 A apart .

3 Two point charges 𝑞1 = 5Χ10−6𝐶 𝑎𝑛𝑑 𝑞2 = 3Χ10

−6𝐶 are located at positions (1 m, 3m,2 m,) and (3m, 5 m, 1 m,) respectively. Find the forces

𝐹12⃗⃗ ⃗⃗ ⃗𝑎𝑛𝑑𝐹21⃗⃗⃗⃗⃗⃗ using vector form of coulomb law

4 A particle of mass m and carrying charge −𝑞1 is moving around a charge+𝑞2 along a circular path of radius r. prove that the period of revolution of the charge −𝑞1 about +𝑞2 is given by.

𝑇 = √16𝜋3𝜀0𝑚𝑟

3

𝑞1𝑞2

5 What equal charge would have to be placed on earth and moon to neutralize their gravitational attraction? Given mass of earth =1025𝑘𝑔& mass of moon =1023𝑘𝑔.

6 A Free pith-ball A of 8 g carries a positive charge of 5 x 10-8 C. What must be the nature and magnitude of charge that should be given to a second pith-ball B fixed 5 cm below the former ball so that the upper ball is stationary.

7 A charge q is placed at the centre of the line joining two equal charges Q. show that the system of three charges will be in equilibrium if q = -Q/4

8. Two identical metallic spherical shells A and B having charges +4Q and -10Q are kept a certain distance apart. A third identical uncharged sphere C is first placed in contact with sphere A and then with sphere B, then sphere A and B are brought in contact and then separated. Find the charges on the sphere A and B.

9 Two point electric charges of values q and 2q are kept at a distance d apart from each other in air. A third charge Q is to be kept along the same line in such a way that the net force acting on it is zero determine the position of charge Q in terms of d.

10 Two particles A and B having charges 8Χ10−6 C and −2Χ10−6 C respectively are held fixed with a separation of 20 cm. where a third charged particle should be placed so that it does not experience a net electric force?

Subject : Mathematics

Assignment 1

Subject : Mathematics

Assignment 2

Subject : Biology

Assignment 1

Subject : Biology

Assignment 2

CLASS 12

Subject- ENGLISH(CORE)

ASSIGNMENTS 1

Poem -1 My Mother at Sixty-six

1. What is the kind of pain and ache that the poet feels?

2. Why are the young trees described as ‘sprinting’?

3. Why has the poet brought in the image of the merry children

‘spilling out of their homes’?

4. Why has the mother been compared to the ‘late winter’s

moon’?

5. What do the parting words of the poet and her smile signify ?

Chapter – 1 The Last Lesson (Flamingo)

1. What was Franz expected to be prepared with for school that day ?

2. What did Franz notice that was unusual about the school that day?

3. What had been put up on the bulletin board?

4. What changes did the order from Berlin cause in school that day?

5. How did Franz’s feelings about M.Hamel and school change?

Subject- ENGLISH(CORE)

ASSIGNMENTS 2

Chapter – 1 The Third level (Vistas)

1. Do you think that the third level was a medium of escape for

Charley? Why?

2. What do you infer from Sam’s letter to Charley ?

3. What happened when Charley went to the Grand Central Station

with the old style currency bills?

4. Describe briefly the scene at the third level of Grand Central as

seen (or seemed to be seen) by Charley.

5. What do you know a first-day cover?

Subject : Chemistry

Assignment 1

Question (1):- Define the following terms;

(a) Molarity (b) Molality (c) Mole fraction

Question (2):- A 500 g toothpaste sample has 0.2 g fluoride concentration.

What is the concentration of

fluorine in terms of ppm and percentage?

Question (3):- 1000 g calcium carbonate solution contains 10 g carbonate.

What will be concentration of

solution?

Question (4):- A solution of glucose in water is labelled as 10% by weight. What

would be the molarity of

the solution?

Question (5):- Calculate the mole fraction of ethylene glycol in a solution

containing 20% of C 2 H 6 O 2 by

mass.

Subject : Chemistry

Assignment 2

Question (1):- Define an ideal solution and write one of its characteristics.

Question (2):- State Henry’s law. What is the effect of temperature on the

solubility of a gas in a liquid?

Question (3):- Calculate the molarity of a solution containing 5 g of NaOH in

450 ml solution.

Question (4):- Calculate the mass percentage of benzene and carbon

tetrachloride if 22 g of benzene is

dissolved in 122 g of carbon tetrachloride.

Question (5):- Calculate the mole fraction of benzene in solution containing

30% by mass in carbon

tetrachloride.

Subject : Computer Science

Assignment 1 Topic :MYSQL

1. What is the use of where clause?

2. What is the use of distinct clause?

3. Which keyword is used to sort the values of a table?

4. What is the difference between

(i) Candidate key and an Alternate Key

(ii) Alter and Update Command

(iii) Delete and Drop Command

(iv) DDL and DML Commands

5. Name and describe the commands of DDL and DML. (Hint: DDL

Commands – Create used to create database /table)

6. Write SQL query to create table(s) from the given data.

7. Write insert command to put data in the table (5 record each)

Student

Column Name Data Type Size Constraint

ADMN_NO Integer 4 Primary Key

SNAME Varchar 20 Not Null

AGE Integer 2

Employee

Column Name Data Type Size

EMP_NO Integer 4

NAME Varchar 20

SALARY Integer 5

DEPARTMENT INTEGER 4

Subject : Computer Science

Assignment 2

Topic :MYSQL

1. Study the following table and write SQL queries for questions(1 -7) and output

(8-10)

Table: Orders

Orderid Pname Quantity Rate Sale_date Discount

1001 Pen 10 20 2019-10-05

1002 Pencil 20 10 2019-10-21

1003 Book 10 100 2019-11-02 50

1004 Eraser 100 5 2019-12-05 25

1005 Copy 50 20 2019-12-10

i) Write a query to display all records from the table orders.

ii) Write a query to display ProductName and its discount.

iii) Write query to display Pname, Quantity and Rate for all the orders that are

either Pencil or Pen.

iv) To display the record of orders having rate more than 10.

v) Write SQL query to display Orders which are not getting any Discount

vi) Write SQL query to display the Pname, Quantity and Sale_date for all Orders

whose total cost (Quantity * Rate) is greater than 500

vii) Write SQL query to display Orders whose Rate is in the range 20 to 100

viii)SELECT Pname, Quantity from Orders WHERE Pname LIKE(‘_e%’);

ix) SELECT Pname, Quantity, Rate FROM Orders Order BY Quantity DESC;

x) SELECT MIN (Rate), MAX (Rate) from Orders;

2. What do you understand by degree and cardinality of a table?

3. What will be the degree and cardinality of table Orders?

4. If a database “Student” exists, which Mysql command helps you to start working in that database

5. Pooja created a table in Mysql. Later she found that there should have been

another column in the table. Which command should she use to add another

column to the table. 6. Explain why the following queries give different outputs on execution:

i. SELECT COUNT(ENAME) FROM EMP;

Output:

5

ii. SELECT Count(*) FROM EMP;

Output:

8

Subject : Economics

Assignment 1

CHAPTER 1. – INTRODUCTION OF MACROECONOMICS Q.1. Define Macroeconomics. Q.2. Study of problem of unemployment in India is considered a microeconomic study (true/false). Q.3. Economics agents includes : (a) producers (b) consumers (c) govt. (d) all of the above Q.4. Give two examples of macroeconomics studies. CHAPTER 2. MONEY WORKSHEET 2 Q.1. When the govt. prints & circulates more currency in the economic system, it may : (a) bring down the general price level (b) push up the general price level (c) increase the supply of goods in the economy (d) none of the above. Q.2. Demand deposits created by commercial bank are called ………………….. (a) Bank money (b) money (c) time deposits (d) high powered money Q.3. Demand deposits include …………………………… (a) saving account and fixed deposits (b) saving account & current account deposits (c) current account and fixed deposits (d) all of the above Q.4. ………………….. are called legal tender : (a) demand deposits (b) time deposits (c) currency and notes (d) inter-bank deposits Q.5. Currency issued by the central bank is called : (a) fiat money (b) high-powered money (c) legal tenders (d) all of the above Q.6. Define high powered money. Q.7. Cash reserves of the commercial bank with RBI are not part of Money Supply (true/false). Q.8. What are time/term deposits? Q.9. Explain the term ‘Liquidity’. Q.10. ...…… is the only institution which can issue currency notes. However, coins are issued by ………… .

Subject : Economics

Assignment 2 WORKSHEET – CHAPTER 6

(one marker) Q.1. RBI does not perform which of the following functions: (a) maintains deposit accounts of the public. (b) issues currency notes ( c) maintains foreign exchange accounts (d) acts as banker to the state govt. Q.2. Credit creation is the process undertaken by RBI. (true/ false) Q.3. Value of money multiplier remains unchanged with a decrease in cash deposits.(true /false) Q.4. ………………… is the main financial advisor of the government . (a) IDBI (b)IBRD (C) RBI (d) NABARD Q.5. Which of the following is the unique feature of money?

(a) acceptability (b) liquidity (c) medium of exchange (d) all of the above Q.6. Money supply bears ………………………relation with the rate of inflation in the economy. (a) positive (b) inverse (c) proportional (d) no relation. Q.7. If legal reserve ratio is 10%, the value of money multiplier would be …………………….. Q.8. Two main components of M1 measure of money supply are ………………. and ………… Q.9. ………………………… is the formulae to the value of money multiplier. Q.10. Printing of more notes depends on minimum reserve ratio. (true/false)

(3-4 markers)

Q.11. Using example, explain the process of credit creation. Q.12. Define Money supply. What are the components of money supply? Q.13. Explain the following functions of RBI : (a) Bank of issue (b) Banker’s bank (c) Banker to government