Physics questions
20027 published questions with worked solutions.
- An electromagnetic wave travelling in x-direction is described by field equation E_y = 300 (t - xc ). If the electron is...
- A liquid drop of diameter 2 mm breaks into 512 droplets. The change in surface energy is α × 10⁻⁶ J. The value of α is _______....
- In single slit diffraction pattern, the wavelength of light used is 628 nm and slit width is 0.2 mm, the angular width of central...
- A vessel contains 0.15 m³ of a gas at pressure 8 bar and temperature 140°C with c_p = 3R and c_v = 2R. It is expanded...
- 1 μC charge moving with velocity v = ( i - 2 j + 3 k) m/s in the region of magnetic field B = (2 i + 3 j - 5 k) T. The magnitude...
- A uniform wire of length l of weight w is suspended from the roof with a weight of W at the other end. The stress in the wire at...
- A tub is filled with water and a wooden cube 10 cm × 10 cm × 10 cm is placed in the water. The wooden cube is found to float on...
- The increase in the pressure required to decrease the volume (ΔV) of water is 6.3 × 10⁷ N/m². The percentage decrease in the...
- The time taken by a block of mass m to slide down from the highest point to the lowest point on a rough inclined plane is 50%...
- Two nuclei of mass number 3 combine with another nucleus of mass number 4 to yield a nucleus of mass number 10. If the binding...
- A solid sphere of mass M and radius R is divided into two unequal parts. The smaller part having mass M/8 is converted into a...
- Two projectiles are projected with the same initial velocities at the 15° and 30° with respect to the horizontal. The ratio of...
- A string A of length 0.314 m and Young's modulus 2 × 10¹⁰ N/m² is connected to another string B of length and Young's modulus...
- One gas of n₁ mole of molecules at temperature T₁, volume V₁, and pressure P₁, and another gas of n₂ mole of molecules at...
- A voltmeter with internal resistance of x Ω can be used to measure upto 20 V. In order to increase its measuring range to 30 V,...
- A parallel plate air capacitor is connected to a battery. The plates are pulled apart at uniform speed v. If x is the separation...
- A telescope with objective diameter R is used to observe a distant star emitting light of wavelength 500 nm, at a resolution of 5...
- A 1 kg block subjected to two simultaneous forces (2î+3ĵ+4k̂) N and (3î−ĵ−2k̂) N is moved a distance of 25 m along (3î−4ĵ)...
- The surface tension of a soap solution is 3.5 × 10⁻² N/m. The work required to increase the radius of a soap bubble from 1 cm to...
- The velocity of a particle executing simple harmonic motion along x-axis is described as v² = 50 − x², where x represents...