XII Physics Solved Numericals | Ch# 18 Magnetic Fields

Board: Sindh Boards
Class : 12, Second Year
Subject: Physics
Unit #18 Magnetic Fields
Numericals:
q. An aluminum window has a width of 60 Frame cm and length of 85 cm as shown in the figure. a. When the window is closed the magnetic flux density is 1.8 x10-4 T is normal to window. b. Calculate the magnetic flux through the window.
3. A wire 1.80 m long carries a current of 13.0 A and makes an angle of 35.0° with a uniform magnetic field of magnitude B = 1.50 T. Calculate the magnetic force on the wire.
4. A solenoid has length L = 1.23 m and inner diameter d = 3.55 cm, and it carries a current I= 5.57 A. It consists of five close-packed layers, each with 850 turns along length L. What is B at its center?
5. A moving coil galvanometer has resistance of 50 ohms and it gives full scale deflection at 4mA current. A voltmeter is made using this galvanometer and a 5Kohms resistance. Calculate the maximum voltage that can be measured using this voltmeter.
6. Compute the magnitude of the magnetic field of a long, straight wire carrying a current of 1 A at distance of lm from it. Compare it with Earth's magnetic field.
7. Find the current in a long straight wire that would produce a magnetic field twice the strength of the Earth's at a distance of 5.0cm from the wire. (Magnetic field of Earth =5.0x 10-5T).
8. What is flux density atadistanceal 1 m in air from along straight conductor carrying a current of 6.5 A. calculate the force per on a similar parallel conductor at a distance of 0.1m from the first and carrying a current of 3A.

[Abdulrehman-yid]

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[TechnicalWolverine]

Sir You are amazing MASHAALLAH May Allah keep You always Happy Aameen

[TechnicalWolverine]

Assalam u Alaikum Sir ye jo worked example 18.7 hai Magnetic field wale chapter ka sir kindly is ke bare mein mujhe thora guide karen sir apki bari meherbani hoge

[wardakanwal]

thank you so much sir, you are helping thousands of students

[javeriaarshad]

Thank you so much sir please upload electromagnetic induction numericals

[Edities_KiNG]

Assalam Walekum sir I have a question, we always convert temperature into Kelvin??

[shahnawazshaikh]

Sir please upload electromagnetic induction.

[uroojshaikh]

AsSalam O Alaikum sir, wanted to ask, does the area always makes angle 0° with the magnetic flux?

[MubarikAli-wq]

sir, , i am having the answer ''0.0002''
in numerical 2

[kardeslerimenglishsubtitle]

Sir question 2 mein hmein kesy pta chaly ga kyy area y axis mein ha aur magnetic field x axis mein without diagram?

[Edities_KiNG]

Sir I have a question we always convert kilogram into gram is it necessary??

[Babakijan]

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Mene2022 me first year ka exam diya tha or 2023 me second year ka..but supply agaya or supply 2024 ke annual me clear kia mene😢sir me apni field change nhi krna chahty me mdcat dena chahty hun but percentage bhot km hyn isliye first year improve krna chahty hun 2025 me 😢kyunke mene 2022 me first year kiya hy to mera paper old book se hi ayga ya new ?or improvement kitne bar kr skty hyn karachi board ka?

[shahnawazshaikh]

Sir, when will you upload next lecture please

[ahsanphysics]

assalamualaikum sir sir do din se koi video nai ae ap ke tabyat sahi he

[Funny_clips-ul]

Sir plz AP din ma 2 video's upload kare book bohut late i hai to end mai time nhi rehta parny ka,

[paktvlive]

Sir jaldi upload kare numericals kindly ❤

[weatherlover]

39:16 so answer
F/L = 3.9×10-⁵
Araha ha .... please check 😢

[ToufiqueAhmed-pe]

Sir 2 din hogayye hai aj video upload Karen na

[Barrel]

Sir please new chapter jaldi se upload karein