Question
State two hazards associated with the use of electricity.

Answer

Two hazards associated with the use of electricity are:
  1. If a person happens to touch a live electric wire, he gets a severe electric shock.
  2. Short-circuiting due to damanged wiring or overloading of the circuit can cause electrical fire in a building.

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

Explain the term “rancidity”. What damage is caused by rancidity?
Image
What impact will the process shown in the image have on Humans if they occupy the last trophic level? Explain.
State two advantages of using disposable paper cups over disposable plastic cups.
A student focuses the image of a candle flame, placed at about 2 m from a convex lens of focal length 10 cm, on a screen. After that he moves gradually the flame towards the lens and each time focuses its image on the screen.
  1. In which direction does he move the lens to focus the flame on the screen?
  2. What happens to the size of the image of the flame formed on the screen?
  3. What difference is seen in the intensity (brightness) of the image of the flame on the screen?
  4. What is seen on the screen when the flame is very close (at about 5 cm) to the lens?
Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively.
  1. Which of these persons can donate eyes?
  2. Which of these persons cannot donate eyes?
Explain why brain and spinal cord are considered as central nervous system.
A student uses spectacles of focal length $-2.5 m.$
$i.$ Name the defect of vision he is suffering from.
$ii.$ Which lens is used for the correction of this defect?
$iii.$ List two main causes of developing this defect.
$iv.$ Compute the power of this lens.
Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.
Object is placed between device and its focus, image formed is enlarged and behind it.
What name is given to:
  1. All the petals of a flower.
  2. All the sepals of a flower?
Explain with the help of a diagram, why the convex lens is also called a converging lens.