Podcast
Questions and Answers
The work function of three photosensitive materials used to build photoelectric devices are given as: Sodium (2.75 eV), copper (4.65 eV) and gold (5.1 eV). Which of the following statements is correct. (The frequency of visible light lies in the range 4 x 1014 Hz to 8 × 1014 Hz) ?
The work function of three photosensitive materials used to build photoelectric devices are given as: Sodium (2.75 eV), copper (4.65 eV) and gold (5.1 eV). Which of the following statements is correct. (The frequency of visible light lies in the range 4 x 1014 Hz to 8 × 1014 Hz) ?
If E = energy, G = gravitational constant, I = impulse and M = mass, then dimensions of [GIM2/E2] are same as that of.
If E = energy, G = gravitational constant, I = impulse and M = mass, then dimensions of [GIM2/E2] are same as that of.
A force F = (3xy - 5z) j + 4zk is applied to a particle. The work done by the force when the particle moves from point (0, 0, 0) to point (2, 4, 0) as shown in the figure is
A force F = (3xy - 5z) j + 4zk is applied to a particle. The work done by the force when the particle moves from point (0, 0, 0) to point (2, 4, 0) as shown in the figure is
A soap bubble (surface tension = T) is charged to a maximum surface density of charge = σ. When it is just going to burst. Its radius R is given by:
A soap bubble (surface tension = T) is charged to a maximum surface density of charge = σ. When it is just going to burst. Its radius R is given by:
Signup and view all the answers
A long straight wire of radius a carries a steady current i. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2 and 2a is,
A long straight wire of radius a carries a steady current i. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2 and 2a is,
Signup and view all the answers
The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux Φ linked with the primary coil is given by Φ = Φ0 + 4t, where Φ is in webers, t is time in second and Φ0 is a constant, the output voltage across the secondary coil is equal to 60 kV, then k is-----
The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux Φ linked with the primary coil is given by Φ = Φ0 + 4t, where Φ is in webers, t is time in second and Φ0 is a constant, the output voltage across the secondary coil is equal to 60 kV, then k is-----
Signup and view all the answers
A solid sphere of mass M and radius R has a spherical cavity of radius R/2 such that the centre of cavity is at distance R/2 from the centre of the sphere. A point mass m is placed inside the cavity at a distance R/4 from the centre of sphere. The gravitational pull between the sphere and the point mass m is:
A solid sphere of mass M and radius R has a spherical cavity of radius R/2 such that the centre of cavity is at distance R/2 from the centre of the sphere. A point mass m is placed inside the cavity at a distance R/4 from the centre of sphere. The gravitational pull between the sphere and the point mass m is:
Signup and view all the answers
If E = energy, G = gravitational constant, I = impulse and M = mass, then dimensions of $ \frac{GIM^2}{E^2} $ are same as that of.
If E = energy, G = gravitational constant, I = impulse and M = mass, then dimensions of $ \frac{GIM^2}{E^2} $ are same as that of.
Signup and view all the answers
A force $ o{F} = (3xy - 5z) o{j} + 4z o{k} $ is applied to a particle. The work done by the force when the particle moves from point (0, 0, 0) to point (2, 4, 0) as shown in the figure is
A force $ o{F} = (3xy - 5z) o{j} + 4z o{k} $ is applied to a particle. The work done by the force when the particle moves from point (0, 0, 0) to point (2, 4, 0) as shown in the figure is
Signup and view all the answers
A long straight wire of radius a carries a steady current i. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2 and 2a is,
A long straight wire of radius a carries a steady current i. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2 and 2a is,
Signup and view all the answers
The increasing order of Ag+ ion concentration in
I. Saturated solution of AgCl
II. Saturated solution of AgI
III. 1M Ag(NH3)+2 in 0.1M NH3
IV. 1M Ag(CN)-2 in 0.1M KCN
Given:
Ksp of AgCl = 1.
The increasing order of Ag+ ion concentration in I. Saturated solution of AgCl II. Saturated solution of AgI III. 1M Ag(NH3)+2 in 0.1M NH3 IV. 1M Ag(CN)-2 in 0.1M KCN Given: Ksp of AgCl = 1.
Signup and view all the answers
Study Notes
Physics Problems
-
Photoelectric Effect:
- Sodium has a work function of 2.75 eV.
- Copper has a work function of 4.65 eV.
- Gold has a work function of 5.1 eV.
- Visible light frequency ranges from 4 x 10^14 Hz to 8 x 10^14 Hz.
- Devices with copper and gold can operate with visible light.
- Devices with sodium can operate with UV light.
-
Dimensional Analysis:
- E = energy
- G = gravitational constant
- I = impulse
- M = mass
- Dimensions of (G I M^2) / E^2 are the same as time.
-
Work Done by a Force:
- Force F = (3xy - 5z)j + 4zk
- Particle moves from (0, 0, 0) to (2, 4, 0).
- The work done by the force = 56 J.
-
Soap Bubble Radius:
- Surface Tension = T
- Surface charge density = σ
- Radius R = √(8ε₀ T) / σ
-
Magnetic Field Ratio:
- Wire radius = a
- Current = i
- The ratio of magnetic field at a/2 to 2a is 1/2.
-
Transformer Output Voltage:
- Primary turns = 50
- Secondary turns = 1500
- Magnetic flux = Φ = Φ₀ + 4t
- Output voltage = 60 kV
- k = 4
-
Gravitational Pull:
- Solid sphere mass = M, radius = R
- Spherical cavity radius = R / 2
- Point mass inside cavity = m
- Distance from center = R / 4
- Gravitational pull = 14GMm / R^2
-
Tuning Forks and Beats:
- Statement 1: Two tuning forks with frequencies 410 Hz and 524 Hz produce no beats.
- Statement 2: For beats to occur, the frequencies of the superposing waves must be nearly equal.
-
Electric Potential of Dipole:
- Dipole moment p = 2i - 3j + 4k
- Point A (2, 3, 1)
- Point B (4, -1, 0)
- Electric potential at B = 2 x 10^9 V
-
Heat Capacity at Constant Volume:
- 5 moles of gas
- Temperature change from 100°C to 120°C
- Change in internal energy = 80 J
- Heat capacity at constant volume = 4 J/K
-
Photon and Proton Energy:
- Photon energy = E
- Proton kinetic energy = E
- De-Broglie wavelength of proton = λ₁
- Photon wavelength = λ₂
- λ₁ / λ₂ is proportional to √E
-
P-T Diagram to P-V Graph:
- Cyclic process ABCA in P-T diagram
- Corresponding P-V graph is shown.
-
Perfectly Elastic Collision:
- Block A (3 kg) moving at 2 m/s
- Block B (3 kg)
- Block C (6 kg)
- Maximum energy stored in the spring = 4 J
-
Current through Battery:
- 6 V battery
- Circuit with multiple resistors
- Current through 6 V battery = 1 / 8 A
-
Diffraction Pattern:
- Red light diffraction pattern
- Replace with blue light
- Diffraction bands become narrower.
-
Screw Gauge Reading:
- Main scale reading = 0 mm
- Circular scale reading = 52 divisions
- 1 mm = 100 divisions
- Diameter of wire = 0.52 cm
-
Electromagnetic Field and Charge Particle:
- Electromagnetic fields vary with time
- Charge particle with mass m and positive charge q given initial velocity v₀ i
- xy plane pass coordinate calculation required.
-
Wheel Acceleration:
- Moment of inertia (I) = 2.5 kg m^2
- Initial angular velocity (ω₁) = 40 rad/s
- Constant torque (τ) = 10 Nm
- Final angular velocity (ω₂) = 60 rad/s
- Time = 6 s
-
Apparent Shift in Beaker:
- Water height = h₁
- Kerosene height = h₂
- Refractive index of water = µ₁
- Refractive index of kerosene = µ₂
-
Escape Velocity:
- Escape velocity of object from planet = 16 km/s
- Second planet has twice density and 3 times radius
- Second planet escape velocity v√2 m/s
- v = 12 km/s
-
Zener Diode Current:
- Zener diode breakdown voltage = 10 V
- Circuit with resistors
- Current through Zener diode = 0.01 A
-
Mutual Inductance:
- Solenoid 1 length = 60 cm, turns/cm = 15, cross-sectional area = 4 x 10⁻³ m²
- Solenoid 2 length = 60 cm, turns/cm = 40, cross-sectional area = 2 x 10⁻³ m²
- Mutual inductance = 12 mH
-
Particle Motion and Distance:
- Particle position x = 3t² + 8t + 4 m
- Time from t = 0 to t = 5 sec
- Total distance S₁
- Distance during retardation S₂
- Calculation of 'a' required.
...(and so on, continuing the rest of the topics using the provided text)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers key concepts in physics, including the work function of photosensitive materials, force calculations, and properties of bubbles. Questions also explore current distributions in wires and energy relations. Test your knowledge on these essential topics in physics.
