English

Which of the following is an ohmic resistance? - Physics

Advertisements
Advertisements

Question

Which of the following is an ohmic resistance?

Options

  • LED

  • Junction diode

  • Filament of a bulb

  • Nichrome wire

MCQ

Solution

Nichrome wire

Hint: Substances that obey Ohm's law are called Ohmic resistors.

shaalaa.com
  Is there an error in this question or solution?
Chapter 8: Current Electricity - Exercise 8 (A) 2 [Page 187]

APPEARS IN

Selina Physics [English] Class 10 ICSE
Chapter 8 Current Electricity
Exercise 8 (A) 2 | Q 1 | Page 187

RELATED QUESTIONS

Fill in the following blank with suitable words: 

Resistance is measured in .............. The resistance of a wire increases as the length ..............; as the temperature ..............; and as the cross-sectional area .............. .


Two metallic spheres A and B kept on insulating stands are in contact with each other. A positively charged  rod P is brought near the sphere A as shown in the figure. The two spheres are separated from each other,  and the rod P is removed. What will be the nature of charges on spheres A and B?


Consider the sacle of voltmeter shown in the diagram and answer the following questions : 

(a) What is the least count of the voltmeter?

(b) What is the reading shown by the voltmeter ?

(c) If the voltmeter is connected across a resistor of 20 `Omega` how much current is flowing through the resistor?


Rewrite the following statement by selecting the correct option.

The S.I. unit of resistance is __________.


What is non-ohmic resistor?


The ratio of the potential difference to the current is known as ________.


Define Current density.


Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its limitation.


Two cells of same emf E but internal resistance r1 and r2 are connected in series to an external resistor R (Figure). What should be the value of R so that the potential difference across the terminals of the first cell becomes zero.


Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1 mm. Conductor B is a hollow tube of outer diameter 2 mm and inner diameter 1 mm. Find the ratio of resistance RA to RB.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×