Welcome to your Phy set - 2
1.
Stress in a wire at 3L/4 from lower end with W1 hanging:
2.
At what temperature should a gold ring be heated to fit over bangle?
3.
Which is NOT a thermodynamic coordinate?
4.
Gas temp increases by 2°C due to 2% pressure rise at const volume. T₁ is:
5.
Charge on C₂ when connected as shown (with total V and C₁ given)
6.
In Wheatstone bridge, interchanging resistors helps eliminate:
7.
Force on moving charge in magnetic field is in what direction?
8.
Magnetic potential ratio: end-on to broad-side-on for same r
9.
Potential energy of bar magnet in field = ?
10.
φ = t³ + 3t – 7 ⇒ emf vs time graph is:
11.
Telegraph wire falls to ground, induced current is:
12.
I = I₁ cosωt + I₂ sinωt ⇒ I_rms = ?
13.
Wave: y = sin(kx – ωt) with λ = 2, f = 1 Hz ⇒ equation is:
14.
Eye defect: diagram showing converging rays before retina
15.
In Young’s double slit experiment, the type of diffraction is:
16.
Minimum potential to stop photoelectric current when Φ = 3.1 eV and λ = 2000 Å:
17.
λ = 2000 Å < threshold λ₀ = 3000 Å. Electrons will:
18.
In Bohr model, which quantity ∝ n²?
19.
Weight of nuclear matter in matchbox (5×4×1 cm³):
20.
Potential U = ax² – bx ⇒ equilibrium position is:
21.
Moment of inertia of equilateral triangle rods of mass M, length l about one vertex:
22.
Projectile velocity v = kVₑ (k
23.
Temp for max density of water in °F?
24.
Given wave speed = 320 m/s, λ = 8 cm. Frequency = ?
25.
If L₁ and L₂ are successive resonance lengths in tube, wavelength is:
26.
2 charges q at rod ends rotated about center ⇒ μ/L ratio is:
27.
Two bar magnets at r apart give F = 8 N. At 2r, force is:
28.
Double the turns of coil with same length. Inductance becomes:
29.
Current after closing key K in RC circuit with R = 6Ω, C = 4μF:
30.
Concave lens (n=1.5), R₁ = –3 cm, R₂ = –4 cm, u = –12 cm. Find v:
31.
Total internal reflection in prism when critical angle C and angle A satisfy:
32.
Silver photoelectric threshold λ₀ = 3250 Å, incident λ = 2536 Å. Electron velocity = ?
34.
Energy equivalent of 0.5 g matter (E = mc²):
36.
The dimensions of Planck’s constant are:
37.
The dimensional formula for Boltzmann’s constant is:
38.
Two bodies A and B with accelerations a1 and a2 travel equal distances in 5th second (A) and 3rd (B)
39.
Which of the following is an axial vector?
40.
If A×B = 0 and B×C = 0, then angle between A and C is:
41.
A string in a car at constant acceleration makes angle θ with vertical. What is θ?
42.
A particle at (6,4) with U = 6x + 8y. Time to cross y-axis is:
43.
Max extension in spring for mass M released from rest:
45.
If moment of inertia doubles and L is constant, what happens to KE?
