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 2 :
Which of the following properties of a proton can change while it moves freely in a magnetic field?
Question 4 :
An electric oven of 2 kW power rating is operated in a domestic electric circuit (220V) that has a current rating of 5 A. Will the fuse blow off?
Question 6 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf1273b230584979b71.png' />
In the above arrangement, a circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti clockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole of the resultant magnet is on the face close to
Question 7 :
At the time of short circuit, the current in the circuit
Question 8 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf3273b230584979b73.JPG ' />
In the arrangement shown in above 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
Question 9 :
State TRUE or FALSE. Bicycle dynamos, car alternators and Power House generators are the sources of direct current.
Question 10 :
Which of the following correctly describes the magnetic field near a long straight wire?
Question 11 :
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 12 :
The essential difference between an AC generator and a DC generator is that
Question 13 :
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.
Question 15 :
State TRUE or FALSE. A wire with a green insulation is usually the live wire of an electric supply
Question 18 :
The most important safety method used for protecting home appliances from short circuiting or overloading is
Question 19 :
A positively charged particle (alpha particle) projected towards West is deflected towards North by a magnetic field. The direction of magnetic field is:
Question 21 :
State TRUE or FALSE. An electric generator works on the principle of electromagnetic induction.
Question 22 : <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 23 :
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 24 :
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 26 : <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 27 :
For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is
Question 28 :
State TRUE or FALSE. The field at the centre of a long circular coil carrying current will be parallel straight lines.
Question 30 :
State TRUE or FALSE. An electric motor converts mechanical energy into electrical energy.
Question 32 :
Choose the incorrect statement from the following regarding magnetic lines of field
Question 36 :
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 37 :
State TRUE or FALSE. Dry cell battery, car battery and DC generator are the sources of direct current.
Question 38 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf5273b230584979b75.png' />
In the above figure, a constant current flows in a horizontal wire in the plane of the paper from east to west. The direction of magnetic field at a point will be North to South
Question 39 :
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 neutrons?
Question 40 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf4273b230584979b74.JPG ' />
In the above figure, a uniform magnetic field exists in the plane of paper pointing from left to right. In the field an electron and a proton move as shown . The electron and the proton experience
Question 41 :
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside coil?
Question 42 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf8273b230584979b79.JPG ' />
In the above figure, AB is a current carrying conductor in the plane of the paper. Given $r_1 > r_2$, where will the strength of the magnetic field be larger ?
Question 43 :
State TRUE or FALSE. Electric motors are used in electric fans, refrigerators, mixers, etc.
Question 44 :
A positively charged particle projected towards West is deflected towards North by a Magnetic Field. The direction of Magnetic Field is
Question 45 :
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil?
Question 46 :
How many times does AC used in India change direction in one second ?
Question 47 :
Why does a compass needle get deflected when brought near a bar magnet?
Question 48 :
A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each
Question 49 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf7273b230584979b78.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 P.
Question 50 :
Which of the following property of a proton can change while it moves freely in a Magnetic Field?
