हिंदी

When the Resistance of a Conductor Increases, the Current ____________ .

Advertisements
Advertisements

प्रश्न

When the resistance of a conductor increases, the current ____________ .

विकल्प

  • increases

  • decreases

  • remains the same

  • increases or decreases
MCQ
Advertisements

उत्तर

When the resistance of a conductor increases, the current decreases.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?

APPEARS IN

संबंधित प्रश्न

When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.


Will the compass needle show deflection when the switch in the circuit shown by figure is closed?


An electromagnet does not attract a piece of iron.


An electric bell has an electromagnet. 


What is Maxwell's corkscrew rule? For what purpose is if used?


The direction of current flowing in the coil of an electromagnet at its two ends X and Y are as shown below:  

  

 What is the polarity of end X?

What is the polarity of end Y?   

Name and state the rule which you have used to determine the polarities. 


(b) State whether the following statements are true or false:

(i) Magnetic poles exist in pairs.


Identify the given figure, write the labels of it.


Explain the magnetic field created by a current around a conductor from the figure.


A soft iron bar is introduced inside the current-carrying solenoid. The magnetic field inside the solenoid ____________.


A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience


In the arrangement shown in Figure  there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then


Magnetic effect of current was discovered by ______.


______ are also used to remove splinters of steel or iron in hospitals dealing with eye injuries.


Edison used a ______ wire coil is a vacuum glass and discovered the first electric bulb in 1879.


______ cells cannot be recharged after use.


What do you mean by the magnetic effect?


Define the magnetic effect of electric current.


The figure given below shows the magnetic field around the conductor. Study it and answer the questions:

  1. What changes are caused by increasing current?
  2. What do you see when the magnetic needle is kept a little away from the wire?
  3. In the second part of the figure, the iron filings arrange themselves in a circular manner around the wire. Why does this happen?

Using an electromagnet, you can make a working model of a railway signal as shown in figure.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×