Question 1 :
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is pushed into the coil?
Question 3 :
It is established that an electric current through a metallic conductor produces a magnetic field around it. Is there a similar magnetic field produced around a thin beam of moving alpha particles?
Question 4 :
The essential difference between an AC generator and a DC generator is that
Question 6 :
A positively charged particle (alpha particle) projected towards West is deflected towards North by a magnetic field. The direction of magnetic field is:
Question 7 :
A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased ?
Question 10 :
Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right hand rule to find out the direction of magnetic field inside the loop.
Question 11 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf6273b230584979b77.JPG ' />
In the above figure, AB is a current carrying conductor in the plane of the paper. What are the directions of magnetic fields produced by it at point Q.
Question 12 :
Why does a compass needle get deflected when brought near a bar magnet?
Question 13 :
How many times does AC used in India change direction in one second ?
Question 14 :
Which of the following correctly describes the magnetic field near a long straight wire?
Question 16 :
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside coil?
Question 17 :
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong Magnetic Field to your right side. What is the direction of Magnetic Field?
Question 19 :
State TRUE or FALSE. An electric generator works on the principle of electromagnetic induction.
Question 20 :
Which of the following property of a proton can change while it moves freely in a Magnetic Field?
Question 21 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf2273b230584979b72.JPG ' />
In the above arrangement if the key is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are
Question 24 :
A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each
Question 25 :
State TRUE or FALSE. Bicycle dynamos, car alternators and Power House generators are the sources of direct current.
Question 26 :
Choose the incorrect statement from the following regarding magnetic lines of field
Question 27 :
State TRUE or FALSE. The field at the centre of a long circular coil carrying current will be parallel straight lines.
Question 28 :
State TRUE or FALSE. An electric motor converts mechanical energy into electrical energy.
Question 29 :
Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right hand rule to find out the direction of magnetic field outside the loop.
