CBSE Class 6 Science Collection of Assignments

Module – 16

Unit – 5: ELECTRICITY AND CIRCUITS

Contents :

1. Conduction Tester- Circuit & Theory

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Module – 17 & 18

Revision And Examinations

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List of Activities

1. To measure the length of a curved line.

2. To prove that magnetic force is maximum at the poles of a magnet and minimum at its centre.

3. To show that a freely suspended magnet always aligns in North-South direction.

4. To find direction with the help of a magnetic compass.

5. To show the process of condensation on the cold surface of a glass containing ice.

6. To show reflection of light from a plane mirror.

7. To prove that light always travel in a straight line (rectilinear propagation of the light).

8. To make a simple electric circuit.

9. To differentiate between conductors and insulators using a conduction tester.

MOTION & MEASUREMENTS OF DISTANCES

TUTORIAL

Types of Motion

Translatory Motion

It is a motion in which all the particles of a body move through the same distance in the same time. E.g. the motion of a drawer of a table, a moving car or train, a ball rolling on the ground. There are two types of translatory motion, rectilinear and curvilinear.

Rectilinear motion

When a body moves along a straight line it is said to be in rectilinear motion. E.g. a car moving on a straight road, an athlete running on a straight track.

Curvilinear motion

When a body moves along a curved path then it is said to be in curvilinear motion. E.g. a ball thrown up in the air at an angle, a car moving on a curved road.

Rotational motion

The motion of a body around a fixed axis without changing its place then it is in rotational motion. E.g. a spinning top, a potter‟s wheel, blades of a moving fan.

Circular motion

 A body is set to be in circular motion when it keeps on moving along a circular path. When a body is in circular motion its position changes with time. E.g. the moon moving around the earth.

 Periodic motion

If a motion repeats itself after a particular time or a definite interval of time then it is known a periodic motion. E.g. pendulum of a clock, movement of the hands of a clock.

Vibratory motion

The to and fro motion of an object, about its position of rest (mean position) is called oscillatory or vibratory motion. E.g. strings of a guitar, a swing and membrane of tabla.

Combined motion

Some times a body can have two or three kinds of motion at the same time. E.g. The earth revolves around the sun, but also rotates on its axis.

Random Motion

When a body does not show any regularity in its motion it is said to be in a random motion.

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Assignment – I, II, III

Q.1. Name the following:

(i) Any ancient means of transport …………………………………

(ii) S.I unit for measuring length …………………………….

(iii) Motion in a straight line …………………………….

(iv) S.I. unit of time is …………………………….

(v) Full form of S.I. unit is ………………………..

(vi) Motion that repeats itself at regular intervals of time is called……………

Q.2. State True or False-

(i) One metre is equal to 1000 centimetre.

(ii) Motion of a wheel is circular motion.

(iii) Metre scale is used to measure length and breadth.

(iv) „Foot‟ is a unit of length.

(v) A curved line can be measured with the help of a scale only.

(vi) Both oscillatory and vibratory motions are examples of periodic motions.

(vii) A metre rod can be used to determine mass of a body.

(viii) For correct measurement of length, we should see the metre scale from one

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