English

Define one ohm.

Advertisements
Advertisements

Questions

Define one ohm.

Define the following:

One ohm

Definition
Advertisements

Solution

One ohm is the resistance of a component when the potential difference of one volt applied across the component drives a current of one ampere through it.

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Current Electricity - Exercise 4.1 i [Page 173]

APPEARS IN

Frank Physics - Part 2 [English] Class 10 ICSE
Chapter 4 Current Electricity
Exercise 4.1 i | Q 10 | Page 173

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

If the potential difference across the ends of a conductor is 220 V and the resistance of the conductor is 44 Ω (ohm), then the current flowing through is _________.

  1. 0.2 A
  2. 0.5 A
  3. 2 A
  4. 5 A

Find the resistance of a conductor if 0.24 A current is passing through it and a potential difference of 24 V is applied across it.


Graph showing the variation of current versus voltage for a material Ga As is shown in the figure. Identify the region of
(i) negative resistance

(ii) where Ohm's law is obeyed.


Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?


What is Resistivity?


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


How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?


What is the necessary condition for a conductor to obey Ohm’s law? 


  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?

How would you connect two resistors in series? Draw a diagram. Calculate the total equivalent resistance.  


Define the following:

Coulomb


State Ohm's law. What are its limitations?

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


Explain the equivalent resistance of a parallel resistor network.


Two cells each of 5V are connected in series across an 8Ω resistor and three parallel resistors of 4Ω, 6Ω, and 12Ω. Draw a circuit diagram for the above arrangement. Calculate

  1. the current drawn from the cell
  2. current through each resistor

Which of the following I-V graph represents ohmic conductors?


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 hue?


A heater of 220 V heats a volume of water m 5 mint time. A heater of 110 V heat in ten second. The resistance of the conductor is


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.


Let the resistance of an electrical device remain constant, while the potential difference across its two ends decreases to one fourth of its initial value. What change will occur in the current through it? State the law which helps us in solving the above stated question. 


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×