Physics questions
20027 published questions with worked solutions.
- The half-life of Au^ 198 is 2.7 days. The activity of 1.50 mg of Au^ 198 if its atomic weight is 198 g mol ^ -1 is, (N_A=6 10^ 23...
- Calculate the value of mean free path ( ) for oxygen molecules at temperature 27°C and pressure 1.01 10^5 Pa. Assume the...
- The refractive index of a converging lens is 1.4. What will be the focal length of this lens if it is placed in a medium of same...
- In order to determine the Young's Modulus of a wire of radius 0.2 cm (measured using a scale of least count = 0.001 cm) and...
- A resistor develops 500 J of thermal energy in 20s when a current of 1.5 A is passed through it. If the current is increased from...
- Statement I : A cyclist is moving on an unbanked road with a speed of 7 kmh^ -1 and takes a sharp circular turn along a path of...
- Two identical antennas mounted on identical towers are separated from each other by a distance of 45 km. What should nearly be...Not in JEE or NEET syllabus
- Red light differs from blue light as they have :
- The energy dissipated by a resistor is 10 mJ when an electric current of 2 mA flows through it in 1s. The resistance is _______ ....
- If one wants to remove all the mass of the earth to infinity in order to break it up completely. The amount of energy that needs...
- A deviation of 2° is produced in the yellow ray when prism of crown and flint glass are achromatically combined. Taking...
- A body of mass 2kg moves under a force of (2 i +3 j +5 k ) N. It starts from rest and was at the origin initially. After 4s, its...
- A swimmer can swim with velocity 12 km/h in still water. Water flowing in a river has velocity 6 km/h. The direction with respect...
- A closed organ pipe of length L and an open organ pipe contain gases of densities _1 and _2 respectively. The compressibility of...
- For an ideal heat engine, the temperature of the source is 127°C. In order to have 60% efficiency the temperature of the sink...
- One main scale division of a vernier callipers is 'a' cm and n^ th division of the vernier scale coincide with (n – 1)th division...
- For changing the capacitance of a given parallel plate capacitor, a dielectric material of dielectric constant K is used, which...
- The pressure acting on a submarine is 3 10^5 Pa at a certain depth. If the depth is doubled, the percentage increase in the...
- The maximum and minimum distances of a comet from the Sun are 1.6 10^ 12 m and 8.0 10^ 10 m respectively. If the speed of the...
- A bar magnet of length 14 cm is placed in the magnetic meridian with its north pole pointing towards the geographic north pole. A...Not in JEE Advanced syllabus