मराठी

Define the unit of resistance (or Define the unit "ohm"). - Science

Advertisements
Advertisements

प्रश्न

 Define the unit of resistance (or Define the unit "ohm").

एका वाक्यात उत्तर

उत्तर

One ohm (Ω) is the resistance of a conductor when a potential difference of one volt is applied to its ends and a current of one ampere flows through it.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Electricity - Exercise 3

APPEARS IN

आईसीएसई Physics [English] Class 10
पाठ 7 Electricity
Short Answers | Q 2

संबंधित प्रश्‍न

State two causes of energy loss in a transformer.


Which of the following statements correctly defines a volt?
(a) a volt is a joule per ampere.
(b) a volt is a joule per coulomb.


Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.


Name a device that help to measure the potential difference across a conductor.


What is the ratio of potential difference and current known as?


Write down the formula which states the relation between potential difference, current, and resistance.


The potential difference between the terminals of an electric iron is 240 V and the current is 5.0 A. What is the resistance of the electric iron?


State the S.I. unit of electric potential.


Explain the analogy between the flow of charge (or current) in a conductor under a potential difference with the free fall of a body under gravity. 


The device used for measuring potential difference is


The voltage across a 3Ω resistance is 6 V. How large is the current? What is
the resistance of a filament lamp when a voltage of 3 V across it causes a
current of 0.5 A?


Write an expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference.


A V-I graph for a nichrome wire is given below. What do you infer from this graph? Draw a labelled circuit diagram to obtain such a graph.


Three resistors are connected to a 12 V battery as shown in the figure given below:

(i) What is the current through the 8 ohm resistor?
(ii) What is the potential difference across the parallel combination of 6 ohm and 12 ohm resistor?
(iii) What is the current through the 6 ohm resistor?


Three resistors are connected to a 6 V battery as shown in the figure given below:

Calculate:
(i) the equivalent resistance of the circuit.
(ii) total current in the circuit.
(iii) potential difference across the 7.2 Ω resistor.


The figure shows a circuit. When the circuit is switched on, the ammeter reads 0.5 A.


(i) Calculate the value of the unknown resistor R.

(ii) Calculate the charge passing through the 3 Ω resistor in 120 s.

(iii) Calculate the power dissipated in the 3 Ω resistor.


A current of 0.2 A flows through a conducting wire for 5 minutes. How much charge will flow?


Exercise.

Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5 A.


A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:


The SI unit of potential difference is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×