Download App

Electricity — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceElectricity3 Marks
Question
State three factors on which the heat produced by an electric current depends. How does it depend on these factors?
✓

Answer

Heat produced by an electric current depends on the following factors:
  1. Heat produced is directly proportional to square of current.
  2. Heat produced is directly proportional to resistance.
  3. Heat produced is directly proportional to the time for which current flows.

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

Explore more

More "Answer the questions.[Phy-3M]" from Electricity→Electricity — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Draw ray-diagrams to show the formation of images when the object is placed in front of a concave mirror (converging mirror):
  1. Between its pole and focus.
  2. Between its centre of curvature and focus Describe the nature, size and position of the image formed in each case.
→
A $4 Ω$ coil and a $2 Ω$ coil are connected in parallel. What is their combined resistance? A total current of 3A passes through the coils. What current passes through the $2 Ω$ coil?
→
An electric lamp of 100 Ω, a toaster of resistance 50 Ω, and a water filter of resistance 500 Ω are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?
→
An electric kettle rated as 1200W at 220V and a toaster rated at 1000W at 220V are both connected in parallel to a source of 220V. If the fuse connected to the source blows when the current exceeds 9.0A, can both appliances be used at the same time? Illustrate your answer with calculations.
→
What is the function of an earth wire? Why is it necessary to earth metallic appliances?
→
Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.
→
An object is 2m from a lens which forms an erect image one-fourth (exactly) the size of the object. Determine the focal length of the lens. What type of lens is this?
→
If an object of 10cm height is placed at a distance of 36cm from a concave mirror of focal length 12cm, find the position, nature and height of the image.
→
Three 2V cells are connected in series and used as a battery in a circuit.
  1. What is the p.d. at the terminals of the battery?
  2. How many joules of electrical energy does 1C gain on passing through
  1. One cell.
  2. All three cells?
→
The image formed by a spherical mirror is real, inverted and is of magnification -2. If the image is at a distance of 30 cm from the mirror, where is the object placed? Find the focal length of the mirror. List two characteristics of the image formed if the object is moved 10 cm towards the mirror.
→