CBSE Class 8


Distinguish between uniform and non-uniform motion [CBSE Class 8 Science] (1)
Distinguish between the following. Cell and Battery ,An Open Switch and A Close Switch [CBSE Class 8 Science] (1)
With the help of an activity explain the making of an electromagnet [CBSE Class 8 Science] (1)
The bulb in the circuit shown in figure below does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow [CBSE Class 8 Science] (1)
In the circuit shown below [CBSE Class 8 Science] (1)
Describe a simple experiment to show that the bulb lights up when an electric circuit is complete and vice-versa [CBSE Class 8 Science] (1)
How does the magnetic effect of electric current help in the working of an electric bell? Explain with the help of a diagram [CBSE Class 8 Science] (1)
Paheli took a wire of length 10 cm. Boojho took a wire of 5 cm of the same material and thickness [CBSE Class 8 Science] (1)
When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain [CBSE Class 8 Science] (1)
How do short circuits occur? [CBSE Class 8 Science] (1)
Write four uses of electromagnets [CBSE Class 8 Science] (1)
On what factors does the strength of an electromagnet depend? [CBSE Class 8 Science] (1)
On what factors does the heat produced in a wire depend? [CBSE Class 8 Science] (1)
What are electric fuses? Why are they important? [CBSE Class 8 Science] (1)
Will the compass needle show deflection when the switch in the circuit shown by figure given below is closed? [CBSE Class 8 Science] (1)
Name any two effects of electric current [CBSE Class 8 Science] (1)
The figure below shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells [CBSE Class 8 Science] (1)
Draw the circuit diagram to represent the circuit shown below [CBSE Class 8 Science] (1)
Draw in your notebook the symbols to represent the following components of electrical [CBSE Class 8 Science] (1)
Boojho made an electromagnet by winding 50 turns of wire over an iron screw [CBSE Class 8 Science] (1)
Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use? [CBSE Class 8 Science] (1)
Name two electric devices for each where heating effect of current is used and magnetic effect of current is used [CBSE Class 8 Science] (1)
Can we use the same fuse in a geyser and a television set? Explain [CBSE Class 8 Science] (1)
With the help of Newton’s disc, prove that seven colours of the rainbow can be recombined and produce white light [CBSE Class 8 Science] (1)
Explain the reflection of light on white paper screen with the help of an activity [CBSE Class 8 Science] (1)
Distinguish between the following. Real image and Virtual image ,Convergent beam and Divergent beam [CBSE Class 8 Science] (1)
You are given three mirrors of different types. How will you identify each one of them? [CBSE Class 8 Science] (1)
What is rectilinear propagation of light? How will you prove it? [CBSE Class 8 Science] (1)
What is regular and irregular reflection? [CBSE Class 8 Science] (1)
Suppose we wish to obtain the real image of a distant tree [CBSE Class 8 Science] (1)