मराठी

What is meant by resistance of a conductor ? Define its SI unit. - Science

Advertisements
Advertisements

प्रश्न

What is meant by resistance of a conductor ? Define its SI unit.

थोडक्यात उत्तर

उत्तर

Resistance is the quality of a conductor that causes it to resist the flow of an electric current through it. It is the proportion of the potential difference between ends to the current flowing. It has a Sl unit of ohm (Ω).

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2022-2023 (March) Outside Delhi Set 2

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

 Name the law which is illustrated by the above VI graph.


A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more same or less when the bulb is not glowing?


In the circuit shown below in Fig, calculate the value of x if the equivalent resistance between A and B is 4 Ω.


How does an increase in the temperature affect the specific resistance of a : 
(i) Metal and
(ii) Semiconductor ?


Define Current density.


The slope of voltage (V) versus current (I) is called:


A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true? 


Ohm's law deals with the relationship between ______


Suppose there is a circuit consisting of only resistances and batteries and we have to double (or increase it to n-times) all voltages and all resistances. Show that currents are unaltered. Do this for circuit of Example 3.7 in the NCERT Text Book for Class XII.


Vinita and Ahmed demonstrated a circuit that operates the two headlights and the two sidelights of a car, in their school exhibition. Based on their demonstrated circuit, answer the following questions.

  1. State what happens when switch A is connected to:
    a) Position 2
    b) Position 3
  2. Find the potential difference across each lamp when lit.
  3. Calculate the current.
    a) in each 12 Ω lamp when lit.
    b) In each 4 Ω lamp when lit.
    OR
  4. Show, with calculations, which type of lamp, 4.0 Ω or 12 Ω, has the higher power.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×