Question 2 :
State TRUE or FALSE. Electric motors are used in electric fans, refrigerators, mixers, etc.

Question 4 :
State TRUE or FALSE. An electric generator works on the principle of electromagnetic induction.

Question 5 :
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 :
The essential difference between an AC generator and a DC generator is that

Question 7 :
<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 11 :
How many times does AC used in India change direction in one second ?

Question 12 :
At the time of short circuit, the current in the circuit

Question 13 :
<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 14 :
Which of the following properties of a proton can change while it moves freely in a magnetic field?

Question 16 :
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 17 :
A positively charged particle (alpha particle) projected towards West is deflected towards North by a magnetic field. The direction of magnetic field is:

Question 18 :
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 What will happen if a bar magnet is withdrawn from inside the coil?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 19 :
The strength of magnetic field inside a long current carrying straight solenoid is

Question 21 :
<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 22 :
Which of the following correctly describes the magnetic field near a long straight wire?

Question 23 :
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 24 :
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 25 :
<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