Q 4 : The answer is 1800 C😴

Q 1: The answer is 0.38 C🙃

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Mcqs 12 is incorrect

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Mai ne ye video prepare ki thi or aj Mera paper that bht SE mcqs is video me SE aye thy thank you so very much ma'am for this effort ☺️💘 appreciated ❤😊

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yaha se aya MCQs?

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PHYSICS CURRENT PAPER MCQS-2025 1. Optics Q1. When you stand in front of a plane mirror, your image is:  Answer: Virtual and the same size as you.  Explanation: Plane mirrors produce virtual, upright, and same-sized images. Q2. Thin films (e.g., soap bubbles) form due to:  Answer: Interference.  Explanation: Colors arise from constructive/destructive interference of light waves. 2. Thermodynamics Q3. If object C is in thermal equilibrium with A and B, what does the zeroth law of thermodynamics state?  Answer: C will always be in thermal equilibrium with both A and B.  Explanation: The zeroth law establishes transitivity of thermal equilibrium. 3. Electromagnetism Q4. Which statement is NOT true about electromagnetic waves?  Answer: Reception of electromagnetic waves does not require an antenna.  Clarification: Reception does require an antenna (e.g., radio/TV signals). The false statement might relate to polarization or another property. Q5. The electric field at 10 cm from a point charge 2×10−9 C2×10−9C is:  Answer: 1800 N/C1800N/C.  Calculation: E=kqr2=(9×109)(2×10−9)(0.1)2=1800 N/CE=r2kq =(0.1)2(9×109)(2×10−9)=1800N/C. Q6. Electric potential of a charged sphere (radius RR, field EE just outside):  Answer: V=E⋅RV=E⋅R.  Explanation: Potential V=kQRV=RkQ, and field E=kQR2E=R2kQ, so V=E⋅RV=E⋅R. 4. Relativity Q7. In time dilation, if ΔtΔt is proper time:  Answer: ΔtΔt (proper time) is smaller than observed time ΔTΔT.  Explanation: Proper time is the shortest measured duration in the rest frame. 5. Quantum Mechanics Q8. The quantum number mm is associated with:  Answer: The z-component of angular momentum.  Explanation: mm is the magnetic quantum number. Q9. Probability of a particle in interval [a,b][a,b] is given by:  Answer: ∫ab∣ψ(x)∣2dx∫ab∣ψ(x)∣2dx.  Explanation: Born’s rule states probability density is ∣ψ∣2∣ψ∣2. 6. Modern Physics Q10. In Compton scattering, the maximum wavelength shift is reduced by:  Answer: Using more massive particles.  Explanation: Δλ∝1mΔλ∝m1; larger mass reduces the shift. 7. Mechanics Q11. Convert 55 mph to m/s:  Answer: ≈24.6 m/s≈24.6m/s (video states 25 m/s).  Calculation: 55 mph×1609 m1 mile×1 hr3600 s≈24.6 m/s55mph×1mile1609m ×3600s1hr≈24.6m/s. Q12. If a car accelerates, the force causing acceleration is:  Answer: Friction from the road on the tires.  Explanation: Tires push backward on the road; Newton’s third law gives forward friction. 8. Thermodynamics (Processes) Q13. In an adiabatic process where internal energy increases by 20 J:  Answer: 20 J of work was done on the system.  Explanation: For adiabatic processes, ΔU=−WΔU=−W. Positive ΔUΔU implies work is done on the system. 9. Waves & Sound Q14. The property of sound that determines pitch is:  Answer: Frequency.  Explanation: Higher frequency = higher pitch. Q15. If the speed of sound is 340 m/s and a pipe’s fundamental frequency is 340 Hz, its length is:  Answer: 0.5 m (assuming open pipe).  Calculation: f=v2L⇒L=v2f=3402×340=0.5 mf=2Lv⇒L=2fv=2×340340=0.5m. 10. Circuits Q16. To design an LC circuit oscillating at 100 Hz with inductance L=2.5 HL=2.5H, the capacitance needed is:  Answer: ≈1 μF≈1μF.  Calculation: f=12πLC⇒C=1(2π×100)2×2.5≈1 μFf=2πLC1⇒C=(2π×100)2×2.51 ≈1μF. 11. Nuclear Physics Q17. A large collection of nuclei undergoing alpha decay has a rate proportional to:  Answer: The number of remaining nuclei (NN).  Clarification: Decay follows dNdt∝NdtdN∝N, not time. 12. Dimensional Analysis Q18. When adding/subtracting quantities, their dimensions must be:  Answer: Identical.  Explanation: Dimensional consistency is required for arithmetic operations. 13. Astrophysics Q19. The Sun’s mass is equivalent to approximately:  Answer: 3.3×105 Earth masses3.3×105Earth masses.  Calculation: M⊙≈1.989×1030 kgM⊙≈1.989×1030kg, Earth mass ≈5.97×1024 kg≈5.97×1024kg. Physics MCQs & Answers 1. When you stand in front of a plane mirror, your image is: o Answer: Virtual and the same size as you. o Explanation: Plane mirrors produce virtual, upright, and same-sized images. 2. If object C is in thermal equilibrium with A and B, what does the zeroth law of thermodynamics state? o Answer: C will always be in thermal equilibrium with both A and B. o Explanation: The zeroth law establishes transitivity of thermal equilibrium. 3. Which statement is NOT true about electromagnetic waves? o Answer: Reception of electromagnetic waves requires an antenna. o Explanation: Reception does require an antenna (e.g., radio waves). The false statement might be about polarization or another property. 4. Thin films (e.g., soap bubbles) form due to: o Answer: Interference. o Explanation: Colors in thin films arise from constructive/destructive interference of light waves. 5. In time dilation (relativity), if Δt is proper time: o Answer: Δt (proper time) is smaller than the observed time ΔT. o Explanation: Proper time is the shortest measured time interval (observed time is longer). 6. The Stern-Gerlach experiment uses: o Answer: A strong uniform magnetic field. o Explanation: It demonstrates quantized electron spin in a magnetic field gradient. 7. Convert 55 mph to m/s: o Answer: ~24.6 m/s (video states 25 m/s). o Calculation: 55 mph×1609 m1 mile×1 hr3600 s≈24.6 m/s55mph×1mile1609 m×3600s1hr≈24.6m/s. 8. In an adiabatic process with ΔU = +20 J: o Answer: 20 J of work was done on the system. o Explanation: For adiabatic processes, ΔU=−WΔU=−W. If ΔUΔU increases, work is done on the system. 9. Probability of a particle in [a, b] is given by: o Answer: ∫ab∣ψ(x)∣2dx∫ab∣ψ(x)∣2dx. o Explanation: The probability is the integral of the wavefunction’s squared magnitude. 10.Quantities being added/subtracted must have: o Answer: Identical dimensions. o Explanation: Dimensional consistency is required for addition/subtraction. 11.Electron drift speed in substances A and B (mean free time τA=2τBτA=2τB): o Answer: Drift speed in A is twice that in B. o Explanation: Drift speed vd∝τvd∝τ. 12.As wavelength increases in a uniform medium, speed: o Answer: Speed remains constant (depends only on medium). o Video claim (incorrect): Speed decreases. o Clarification: Speed v=fλv=fλ; if λλ increases, ff decreases, but vv is fixed. 13.Smallest energy electromagnetic wave: o Answer: Radio waves. o Explanation: Energy E∝νE∝ν (frequency). Radio waves have the lowest frequency. 14.Planetary orbital acceleration depends on: o Answer: Sun’s mass. o Explanation: From Newton’s law of gravitation: a∝Msunr2a∝r2Msun. 15.Sound property determining pitch: o Answer: Frequency. o Explanation: Higher frequency = higher pitch. 16.LC circuit oscillation frequency (100 Hz, L = 2.5 H): o Answer: Capacitance C≈1 μFC≈1μF. o Calculation: f=12πLC⇒C=1(2πf)2L≈1 μFf=2πLC1⇒C=(2πf)2L1≈1μF. 17.Pressure at the Sun’s surface: o Answer: ~109 Pa109Pa. o Video claim: 3×109 Pa3×109Pa. o Note: Actual solar surface pressure is complex but extreme. 18.Electric potential outside a charged sphere (radius RR, field EE): o Answer: V=E⋅RV=E⋅R. o Explanation: E=kQR2E=R2kQ, V=kQR=E⋅RV=RkQ=E⋅R. 19.Quantum number mm: o Answer: Z-component of angular momentum. o Explanation: mm corresponds to the magnetic quantum number. 20.Compton scattering maximum wavelength shift: o Answer: Reduced by using massive particles. o Explanation: Δλ∝1mΔλ∝m1. Larger mass = smaller wavelength shift. 21.Time dilation example (spaceship): o Answer: Proper time ΔtΔt < observed time ΔTΔT. o Explanation: Proper time is the moving observer’s shorter duration. 22.Radioactive decay rate: o Answer: Proportional to remaining nuclei (exponential decay). o Video claim (incorrect): Proportional to time since decay started. o Clarification: Rate ∝N(t)∝N(t), not time. 23.Electric field 10 cm from a 2×10−9 C2×10−9C charge: o Answer: 1800 N/C1800N/C. o Calculation: E=kqr2=(9×109)(2×10−9)0.12=1800 N/CE=r2kq =0.12(9×109)(2×10−9)=1800N/C

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18:10 wrong answer question 33 The correct answer is Punctuation error.

it was soo helpful, most of the mcqs jo k exam m ay thy, wo en 90s m sy mny prepare kiye thy, or subjective part b, Thankuu very much exam 30th jan 2025, 07:45am

3:52 question 7 ie wrong 7. Choose the best answer from the given options. The people screamed ____ ran in different directions when the lorry crashed into the roadside stall. and neither if but The correct answer is: and

Q 45 anser is neither and nor .

Question no 82,83 dono ky answer galat h 82. Easy and effective way 83. Series

Brother first ap confirm kre KY konsa mcq correct h fir plz video upload kre Abi apki videos KY Kafi McQ check krny lar wrong nikly So mairy Bhai mind ni krna but you have to first check out your entire file and then you have to upload

Plz anyone tell y mcqs new update handouts sy h plz tell me

MCQs 2 selected answer is wrong?

Mcqs 12 wrong

Q7 answer is and not but

Lakin in mcqs se paper aya tha please answer correct kren

sary ans confirm han kya?

17 mcqs answer is c option

Question 14 is duplicate

7 mcqs answer is d option

Aoa Mcq 31 galat mark hy tax decrease hony sy income and consumption dono increase hoty hain

Yahan a kch ksi ka aya tha??

1 bi mcq nhi aya yaha sy

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MGT411 ki video upload nae ki ap ne ....paper tha maira

AOA good

Aoa Mgt411 ky liya b vedio upload kr de

1658 ans h 11 ka

Very informative video🎉

Assalamualaikum yh file Kha say mily gii

Question 6 answer is when below 800 degree C

If the two light are coherent it's mean constant phase difference

4 mcqs ka answer 1800 hain

question. 6 is also wrong correct option is (a)

Iski koi file ki link nahi hay? Iss trhan pause krkr mushkil ho raha hay.