Computer For Class 10 (Model Set 1)

Model Set 1

 Group A

Fundamentals

1.   Answer the following questions: -                                   1x5=5

      a)   'Computer network reduces cost.' Give any two stpoints to support this statement.

      b)   What is internet? Give any two popular web browser  software.

      c)   Give one positive and one negative impact of computer in our society.

      d)   Give any two preventive measures for computer software security.

      e)   What is computer virus? Name any one antivirus   software.

2.   Fill in the blanks with suitable words: -                      4 x 0.5=2

      a)   .................is a buying and selling products online.

      b)   A network ........... refers to the physical layout of the  network.

      c)   A computer capable of handling a text, graphics, audio,animation and video is called .............computer.

Science For Class 10 (Model Set 2)

Model Set 2

 Attempt all the questions.

SET ‘B’

Physics

1. (a) The body weighs more at pole than equator. Why? The mass of the planet is 6 x 10²⁴ kg and its radius is 6400 km. What is the weight of 50kg mass standing on that planet? (G = 6.67x10 ^–11 Nm²/kg²)

                                                                                    [1+2+1=4]

 (b) Nuclear Energy is also considered an alternative source of energy. Why? Show the complete thermonuclear reaction taking place on the surface of sun and write its two conditions. [1+2.5=3.5]

2. (a) Define Pascal’s law. If weight of a body in air is 20 N and in a liquid is 10N, find the weight of displaced liquid and mass of that liquid.  [1+2.5=3.5]

 (b) A Ship made of iron can easily float in water. Why? An ice block of dimension 60cm x 30cm x 20cm is placed in water. What is the height of ice above the surface of water if the density of ice and water is 0.9gm/cm³ and 1gm/cm³ respectively? [1+3=4]

3. (a) Define Specific Heat capacity. Write the SI unit of temperature. How much heat is required to raise the temperature of 10kg mass of a substance by 10°C when its specific heat capacity is 2100 J/kg°C? [1.5+2=3.5]

Science For Class 10 (Model Set 1)

MOdel Set 1

Attempt all the questions.

Physics

1. (a) Paratroopers are not hurt even if they jump from such a greater height. Why? The mass of the earth is 6x10²⁴ kg and its radius is 6400 km what is the mass of a man weighing 977 Newton in a spring balance? (Universal gravitational constant is 6.67x10^-11 Nm²/kg²) [2+2.5 = 4.5]

(b) What is thermonuclear fusion reaction? Suggest any two alternative ways to prevent the energy crisis in the context of Nepal. [1+2 = 3]

2. (a)  State Pascal's law. If piston A, B and C of the apparatus given in the diagram are friction less, what is the area of the piston B? What force is exerted on the piston C? [1+2 = 3]