Download App

Electricity — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceElectricity1 Mark
MCQ
Electrical resistivity of a given metallic wire depends upon.
  • A
    Its length.
  • B
    Its thickness.
  • C
    Its shape.
  • D
    Nature of the material.
✓

Answer

  • Nature of the material.

Explanation:

Electrical resistivity of a given metallic wire depends on number density of free electrons in the conductor which is the nature of material, i.e., 

$\text{p}\propto\frac{1}{\text{n}},\text{n}=$ number of free electrons per unit volume. It also depends on the temperature of conductor. 

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

Which of the following properties of a proton can change when it moves freely in a magnetic field:
→
An electric refrigerator rated 400W operates 8 hours/ day. The cost of the energy to operate it for 30 days at Rs. 3 per kWh is:
→
One of the following is not a characteristic of a good fuel. This is:
  1. High calorific value.
  2. No emission of smoke.
  3. Smooth burning.
  4. High ignition temperature.
→
The force experienced by a current-carrying conductor placed in a magnetic field is the largest when the angle between the conductor and the magnetic field is:
→
The defect of vision in which a person cannot see the distant objects clearly but can see nearby objects clearly is called:
→
Myopia and hypermetropia can be corrected by:
→
With age Near point and Far point receeds due to:
A: Weakening of ciliary muscles.
B: Reducing ability to change the focal length.
→
A student is using a convex lens of focal length 10 cm to study the image formation by a convex lens for the various positions of the object. In one of his observations, he may observe that when the object is placed at a distance of 20 cm from the lens, its image is formed at (select the correct option):
→
The real image formed by a concave mirror is smaller than the object if the object is:
→
The strength of magnetic field inside a long current carrying straight solenoid is:
→