Question
Distinguish between good conductors, resistors and insulators. Name two good conductors, two resistors and two insulators.

Answer

Those substances which have very low electrical resistance are called as good conductors. E.g., copper and aluminium.
Those substances which have comparatively high resistance than conductors are known as resistors. E.g., nichrome and manganin.Those substances which have infinitely high electrical resistance are called insulators. E.g., rubber and wood.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An object 20cm from a spherical mirror gives rise to a virtual image 15cm behind the mirror. Determine the magnification of the image and the type of mirror used.
The diverging lens in part (a) is replaced by a converging lens also of focal length 100mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
How is the refractive index of a medium related to the speed of light? Obtain an expression for refractive index of a medium with respect to another in terms of speed of light in these two media?
Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if:
  1. A current is passed through coil B by plugging the key?
  2. He current is stopped by removing the plug from the key?
Explain your answer mentioning the name of the phenomenon involved.
What are the special features of commercial electric motors?
An electric bulb is rated as 10W, 220V. How many of these bulbs can be connected in parallel across the two wires of 220V supply line if the maximum current which can be drawn is 5A?
An object is placed at a distance of 100cm from a converging lens of focal length 40cm.
  1. What is the nature of image?
  2. What is the position of image?
A convex lens produces an inverted image magnified three times of an object placed at a distance of 15cm from it. Calculate focal length of the lens.
Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliar muscles, eye-lens, retina, optic nerve and blind spot.
What will happen if slow moving neutrons are made to strike the atoms of a heavy element 92U235? What?
Explain how tidal energy can be used to generate electricity.