Physics questions
20027 published questions with worked solutions.
- Statement-I : By doping silicon semiconductor with pentavalent material, the electrons density increases. Statement-II : The...Not in JEE Advanced syllabus
- A uniform chain of length 3 meter and mass 3 kg overhangs a smooth table with 2 meter laying on the table. If k is the kinetic...
- The electric field in a plane electromagnetic wave is given by E =200 [ ( 0.5 10^3 m )x- (1.5 10^ 11 rad s t ) ] V m j If this...
- A source and a detector move away from each other in absence of wind with a speed of 20 m/s with respect to the ground. If the...
- Two spherical balls having equal masses with radius of 5 cm each are thrown upwards along the same vertical direction at an...
- A soap bubble of radius 3 cm is formed inside the another soap bubble of radius 6 cm. The radius of an equivalent soap bubble...
- An amplitude modulated wave is represented by C_m(t) = 10(1 + 0.2 cos12560t) sin(111 × 10^4t) volts. The modulating frequency in...Not in JEE or NEET syllabus
- Two travelling waves produces a standing wave represented by equation, y = 1.0 mm cos(1.57 cm^ -1 ) x (78.5s^ -1 )t. The node...
- White light is passed through a double slit and interference is observed on a screen 1.5 m away. The separation between the slits...
- If 'C' and 'V' represent capacity and voltage respectively then what are the dimensions of , where C V = ?
- The length of metallic wire is _1 when tension in it is T_1. It is _2 when the tension is T_2. The original length of the wire...
- An aeroplane, with its wings spread 10 m, is flying at a speed of 180 km/h in a horizontal direction. The total intensity of...
- A tuning fork A of unknown frequency produces 5 beats/s with a fork of known frequency 340 Hz. When fork A is filed, the beat...
- A particle executes S.H.M., the graph of velocity as a function of displacement is :
- The trajectory of a projectile in a vertical plane is y = – x^2, where and are constants and x & y are respectively the...
- The internal energy (U), pressure (P) and volume (V) of an ideal gas are related as U = 3PV + 4. The gas is :
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion (A) : For a...
- Given below are two statements : Statement I : An electric dipole is placed at the centre of a hollow sphere. The flux of...
- The recoil speed of a hydrogen atom after it emits a photon in going from n = 5 state to n = 1 state is :
- A radioactive sample is undergoing decay. At any time t_1, its activity is A and another time t_2, the activity is A 5 . What is...