Download App

Electricity — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceElectricity1 Mark
MCQ
When a current flows through a conductor its temperature:
  • A
    May increase or decrease
  • B
    Remains same
  • C
    Decreases
  • D
    Increases
✓

Answer

  1. Increases

Explanation:

According to Joule's heating effect of current, heat energy is generated across a conductor due to the current flowing through it and hence its temperature increases.

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 "M.C.Q-[Phy-1M]" from Electricity→Electricity — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Myopia occurs due to:
→
An electric heater is rated at 2kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours?
  1. Rs 12.
  2. Rs 24.
  3. Rs 36.
  4. Rs 48.
→
→
Which of the following phenomena of light are involved in the formation of a rainbow?
  1. Reflection, refraction and dispersion.
  2. Refraction, dispersion and total internal reflection.
  3. Refraction, dispersion and internal reflection.
  4. Dispersion, scattering and total internal reflection.
→
A concave mirror has a focal length of 25cm. At which of the following distance should a person hold his face from this concave mirror so that it may act as a shaving mirror?
  1. 45cm
  2. 20cm
  3. 25cm
  4. 30cm
Give reason for your choice.
→
The image formed by a plane mirror is:
  1. Virtual, behind the mirror and enlarged.
  2. Virtual, behind the mirror and of the same size as the object.
  3. Real, at the surface of the mirror and enlarged.
  4. Real, behind the mirror and of the same size as the object.
→
Your are given three equal resistances. In how many combinations can they be arranged:
→
1.54 is combined with another prism p2 made from glass of refractive index 1.92 to produce dispersion without deviation. Then the angle of prism P2 is
→
If an object is placed 21cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed 19cm from the lens, the image formed is slightly larger than object. The approximate focal length of the lens is:
→
The substance having infinitely high electrical resistance is called:
→