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 :
<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 4 :
State TRUE or FALSE. Dry cell battery, car battery and DC generator are the sources of direct current.

Question 6 :
<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 7 :
The strength of magnetic field inside a long current carrying straight solenoid is

Question 9 :
A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each

Question 10 :
State TRUE or FALSE. The field at the centre of a long circular coil carrying current will be parallel straight lines.

Question 11 :
State TRUE or FALSE. An electric generator works on the principle of electromagnetic induction.

Question 12 :
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 13 :
State TRUE or FALSE. An electric motor converts mechanical energy into electrical energy.

Question 14 :
State TRUE or FALSE. Electric motors are used in electric fans, refrigerators, mixers, etc.

Question 17 :
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 18 :
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 19 :
<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 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/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 22 :
State TRUE or FALSE. Electric motors are used in electric fans, refrigerators, mixers, etc.

Question 23 :
The most important safety method used for protecting home appliances from short circuiting or overloading is

Question 25 :
<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 26 :
A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each

Question 27 :
Why does a compass needle get deflected when brought near a bar magnet?

Question 29 :
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil?