English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Choose the correct alternative: The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of (1022/1023). - Physics

Advertisements
Advertisements

Question

Choose the correct alternative:

The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of (1022/1023).

One Line Answer

Solution

The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of 1022.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Current Electricity - Exercise [Page 129]

APPEARS IN

NCERT Physics [English] Class 12
Chapter 3 Current Electricity
Exercise | Q 3.19 (d) | Page 129
NCERT Physics [English] Class 12
Chapter 3 Current Electricity
Exercise | Q 19.4 | Page 129

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

What conclusion can you draw from the following observations on a resistor made of alloy manganin?

Current
A
Voltage
V
Current
A
Voltage
V
0.2 3.94 3.0 59.2
0.4 7.87 4.0 78.8
0.6 11.8 5.0 98.6
0.8 15.7 6.0 118.5
1.0 19.7 7.0 138.2
2.0 39.4 8.0 158.0

A heating element is marked 210 V, 630 W. What is the value of the current drawn by the element when connected to a 210 V dc source?


Two wires of equal length, one of copper and the other of manganin have the same resistance. Which wire is thicker?


Plot a graph showing the variation of stopping potential with the frequency of incident radiation for two different photosensitive materials having work functions W1 and W2 (W1 > W2). On what factors does the (i) slope and (ii) intercept of the lines depend?


Two resistors A and B have resistances RA and RB, respectively, and RA < RB. The resistivities of their materials are ρA and ρB.


A wire of length 1 m and radius 0.1 mm has a resistance of 100 Ω. Find the resistivity of the material.


What length of a copper wire of cross-sectional area 0.01 mm2 will be needed to prepare a resistance of 1 kΩ? Resistivity of copper = 1.7 × 10–8 Ωm


The electrochemical equivalent of a material depends on _______________ .


How does the resistivity of a semiconductor change with rise of temperature ? Explain.


If R1 and R2 are filament resistances of a 200 W and a 100 W bulb respectively, designed to operate on the same voltage, then:


Choose the correct alternative:

Alloys usually have much (lower/higher) temperature coefficients of resistance than pure metals.


Choose the correct alternative:

The resistivity of the alloy manganin is nearly independent of/increases rapidly with increase of temperature.


The resistivity of alloy manganin is ______.


Fuse wire should have


If the last band on the carbon resistor is absent, then the tolerance is ______


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×