Physics
The following diagram shows four circuits A, B, C and D. Each circuit has a cell and a torch bulb. Name the circuits in which the bulb will glow? Give reason to your answer.
Electro-Magnetism
15 Likes
Answer
The bulb will glow in circuit A as both the wires i.e. copper and aluminium are good conductors of electricity. But in other circuits B, C and D silk, cotton etc. are used which are insulators i.e. they do not allow the flow of electricity through them. So bulbs do not glow in circuits B, C and D.
Answered By
9 Likes
Related Questions
Read the clues across and clues downwards and fill up the blank squares.
Across :
- The space around a magnet in which the magnetic needle of the magnetic compass gets influenced is called …………… of that magnet.
- …………… is a sure test for a magnet.
- In metals, current flows due to the motion of …………… electrons.
Down :
- …………… are temporary magnets which are made up of soft iron by electrical method.
- In a …………… circuit, all appliances work together.
- We use …………… cells in a T.V. remote.
Select conductors and insulators from the following:
Glass, silver, copper, wood, paper, pure water, impure water, aluminium, iron, leather, plastic, steel, human body and ebonite
The diagram given below shows a bulb connected with a cell having terminals A and B. Mark the direction of current in the bulb.
In which arrangements are the appliances connected in the electric circuit of our homes, Series or Parallel? Give one reason for your answer.