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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

Choose the correct alternative. Which of the following is an ohmic conductor?

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प्रश्न

Choose the correct alternative.

Which of the following is an ohmic conductor?

पर्याय

  • transistor

  • vacuum tube

  • electrolyte

  • nichrome wire

MCQ
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उत्तर

nichrome wire

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 11: Electric Current Through Conductors - Exercises [पृष्ठ २१९]

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बालभारती Physics [English] Standard 11 Maharashtra State Board
पाठ 11 Electric Current Through Conductors
Exercises | Q 1. (ii) | पृष्ठ २१९

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm’s law.


What is Resistivity?


Name the physical quantity whose unit is "ohm".


When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Calculate the value of the resistance of the resistor.


Keeping the p.d. constant, the resistance of a circuit is halved. The current will become:

(a) one-fourth
(b) four time
(c) half
(d) double


The graph between V and I for a conductor is a straight line passing through the origin. 

 Which law is illustrated by such a graph?


Four resistances of 16 ohms each are connected in parallel. Four such combinations are connected in series. What is the total resistance? 

 


 A resistance of 40 ohms and one of 60 ohms are arranged in series across 220 volt supply. Find the heat in joules produced by this combination of resistances in half a minute.


  1. Draw a V-I graph for a conductor obeying Ohm’s law.
  2. What does the slope of V–I graph  for a conductor represent?

In a conductor 6.25 × `10^16` electrons flow from its end A to B in 2 s. Find the current flowing through the conductor (e = 1.6 × `10^-19` C)


An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.


In an experiment of verification of Ohm’s law following observations are obtained.

Potential difference V (in volt)

0.5 1.0 1.5 2.0 2.5
current I (in ampere) 0.2 0.4 0.6 0.8 1.0

Draw a V-I graph and use this graph to find:

  1. the potential difference V when the current I is 0.5 A,
  2. the current I when the potential difference V is 0.75 V,
  3. the resistance in a circuit.

A wire has a length of 2.0 m and a resistance of 5.0 Ω. Find the electric field existing inside the wire if it carries a current of 10 A.


State Ohm’s law. Is it always true?

Fig. represents the circuit used for the verification of ohm's law. Label the different parts from A and F. State the function of each.


SI unit of resistance is:


Ohm’s law states the relationship between power and voltage.


A wire connected to a power supply of 230 V has power dissipation P1. Suppose the wire is cut into two equal pieces and connected parallel to the same power supply. In this case, power dissipation is P2. The ratio of `"P"_2/"P"_1` is


What is non ohmic device?


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


State Ohm’s law? How can it be verified experimentally? Does it hold good under all conditions? Comment.


Calculate the total resistance of the circuit and find the total current in the circuit.


You are provided with a resistor, a key, an ammeter, a voltmeter, four cells of 1.5 V each and few connecting wires. Using circuit components, draw a labelled circuit diagram to show the setup to study Ohm's law.

State the relationship between potential difference (V) across the resistor and the current (I) flowing through it. Also draw V-I graph, taking V on the X-axis.


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


Why should an ammeter have low resistance?


A current of 3.2 mA flows through a conductor. If charge on an electron is −1.6 × 10-19 coulomb, find the number of electrons that will pass each second through the cross section of that conductor.


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