Question 1 :
<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 2 :
A positively charged particle (alpha particle) projected towards West is deflected towards North by a magnetic field. The direction of magnetic field is:

Question 3 :
State TRUE or FALSE. A wire with a green insulation is usually the live wire of an electric supply

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

Question 5 :
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 6 :
State TRUE or FALSE. An electric motor converts mechanical energy into electrical energy.

Question 8 :
Which of the following correctly describes the magnetic field near a long straight wire?

Question 9 :
How many times does AC used in India change direction in one second ?

Question 10 :
Why does a compass needle get deflected when brought near a bar magnet?

Question 11 :
<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 12 :
The most important safety method used for protecting home appliances from short circuiting or overloading is

Question 14 :
A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each

Question 15 :
How many times does AC used in India change direction in one second ?

Question 16 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d41273b230584979bcd.jpg' /> In the above image,the values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given. Find the mean resistance.

Question 17 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3d273b230584979bc8.jpg' /> In the above diagram, the resistors $R_{1},R_{2},R_{3}$ have the values 5 Ω, 10 Ω, 30 Ω, respectively, which have been connected to a battery of 12 V. Calculate the total current in the cicruit.

Question 18 :
State true or false: When connected to the same source the current will flow more easily through a thick wire than thin wire.

Question 19 :
An electric kettle consumes 1 kW of electric power when operated at 220 V . A fuse wire of what rating must be used for it ?

Question 20 :
Calculate the power used in the 2 Ω resistor in the circuit containing a a 4 V battery in parallel with 12 Ω and 2 Ω resistors.

Question 21 :
An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?

Question 22 :
An circuit consist of a battery of three cells of 2V each , a $5\Omega$ resistor, an $8\Omega$ resistor, and a $12\Omega$ resistor and a plug key all connected in series. Also there is an ammeter to measure the current through resistors and voltmeter to measure the potential difference across $12\Omega$ resistor. What is the reading of the ammeter?

Question 23 :
Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A?

Question 24 :
Calculate the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.

Question 25 :
How much power is used in 2$\Omega$ resistor when a 4 V battery is connected in parallel with 12$\Omega$ and 2$\Omega$ resistors?

Question 26 :
An electric lamp of $100\Omega$, a toaster of resistance $50\Omega$, and a water filter of resistance $500\Omega$ are connected in parallel to a 220 V source. What is the current through an electric iron connected to the same source that takes as much current as all three appliances?

Question 27 :
An electric lamp of 100 ohm, a toaster of 50 ohm and a water filter of resistance 500 ohm are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all the three appliances ?

Question 29 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d31273b230584979bba.PNG' /> Above image is the symbol of ______ in circuit diagram.