Physics questions
20027 published questions with worked solutions.
- A uniform wooden stick of mass 1.6 kg and length l rests in an inclined manner on a smooth, vertical wall of height h(<l) such...
- Highly excited states for hydrogen-like atoms (also called Rydberg states) with nuclear charge Ze are defined by their principal...
- An incandescent bulb has a thin filament of tungsten that is heated to high temperature by passing an electric current. The hot...
- A plano-convex lens is made of a material of refractive index n. When a small object is placed 30 cm away in front of the curved...
- A length-scale (l) depends on the permittivity ( ) of a dielectric material, Boltzmann constant (k_B), the absolute temperature...
- The position vector r of a particle of mass m is given by the following equation r (t)= t^3 , i + t^2 , j , where =10/3 m s ^ -3...
- A metal is heated in a furnace where a sensor is kept above the metal surface to read the power radiated (P) by the metal. The...
- Consider two solid spheres P and Q each of density 8 gm cm^ -3 and diameters 1 cm and 0.5 cm, respectively. Sphere P is dropped...
- Two inductors L_1 (inductance 1 mH, internal resistance 3 ) and L_2 (inductance 2 mH, internal resistance 4 ), and a resistor R...
- The electrostatic energy of Z protons uniformly distributed throughout a spherical nucleus of radius R is given by E= 3 5...
- An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half-life 18 days...
- A gas is enclosed in a cylinder with a movable frictionless piston. Its initial thermodynamic state at pressure P_i=10^5 Pa and...
- The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially each of the wires has a length of 1 m at...
- In an experiment to determine the acceleration due to gravity g, the formula used for the time period of a periodic motion is T=2...
- Consider two identical galvanometers and two identical resistors with resistance R. If the internal resistance of the...
- A block with mass M is connected by a massless spring with stiffness constant k to a rigid wall and moves without friction on a...
- A flat plate is moving normal to its plane through a gas under the action of a constant force F. The gas is kept at a very low...
- A human body has a surface area of approximately 1 m^2. The normal body temperature is 10 K above the surrounding room...
- For an isosceles prism of angle A and refractive index , it is found that the angle of minimum deviation _m=A. Which of the...
- A drop of liquid of radius R=10^ -2 m having surface tension S= 0.1 4 Nm^ -1 divides itself into K identical drops. In this...