Physics questions
20027 published questions with worked solutions.
- An electron (mass m) with initial velocity v =v_0 i +v_0 j is in an electric field E =-E_0 k . If _0 is initial de-Broglie...
- A simple pendulum is being used to determine the value of gravitational acceleration g at a certain place. The length of the...
- A particle of mass m is dropped from a height h above the ground. At the same time another particle of the same mass is thrown...
- A transverse wave travels on a taut steel wire with a velocity of v when tension in it is 2.06 10^4 N. When the tension is...
- A galvanometer having a coil resistance 100 gives a full scale deflection when a current of 1 mA is passed through it. What is...
- In a double-slit experiment, at a certain point on the screen the path difference between the two interfering waves is 1 8 th of...
- The series combination of two batteries, both of the same emf 10 V, but different internal resistance of 20 and 5 , is connected...
- A ball is dropped from the top of a 100 m high tower on a planet. In the last 1 2 s before hitting the ground, it covers a...
- An asteroid is moving directly towards the centre of the earth. When at a distance of 10 R (R is the radius of the earth) from...
- A heat engine is involved with exchange of heat of 1915 J, –40 J, +125 J and QJ, during one cycle achieving an efficiency of...
- In a Young's double slit experiment, 16 fringes are observed in a certain segment of the screen when light of wavelength 700 nm...
- In a hydrogen atom the electron makes a transition from (n + 1)th level to the nth level. If n>>l, the frequency of radiation...
- If momentum (P), area (A) and time (T) are taken to be the fundamental quantities then the dimensional formula for energy is :
- A capillary tube made of glass of radius 0.15 mm is dipped vertically in a beaker filled with methylene iodide (surface tension =...
- The height 'h' at which the weight of a body will be the same as that at the same depth 'h' from the surface of the earth is...
- An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true ?...
- An inductance coil has a reactance of 100 . When an AC signal of frequency 1000 Hz is applied to the coil, the applied voltage...
- Two uniform circular discs are rotating independently in the same direction around their common axis passing through their...
- A 10 capacitor is fully charged to a potential difference of 50 V. After removing the source voltage it is connected to an...
- When the temperature of a metal wire is increased from 0°C to 10°C, its length increases by 0.02%. The percentage change in its...