Physics questions
20027 published questions with worked solutions.
- A proton, a neutron, an electron and an -particle have same energy. If _ p , _ n , _ e and _ are the de Broglie's wavelengths of...
- Match List I and List II List I: A. Facsimile B. Guided media Channel C. Frequency Modulation D. Digital Single List II: I....Not in JEE or NEET syllabus
- For z = a^ 2 x^ 3 y^ 1/2 , where 'a' is a constant. If percentage error in measurement of 'x' and 'y' are 4% and 12%...
- A curved in a level road has a radius 75 m. The maximum speed of a car turning this curved road can be 30 m/s without skidding....
- Moment of Inertia (M.I.) of four bodies having same mass 'M' and radius '2R' are as follows : I_ 1 = M.I. of solid sphere about...
- Two satellites S_ 1 and S_ 2 are revolving in circular orbits around a planet with radius R_ 1 = 3200 km and R_ 2 = 800 km...
- When a gas filled in a closed vessel is heated by raising the temperature by 1°C, its pressure increases by 0.4%. The initial...
- 27 identical drops are charged at 22 V each. They combine to form a bigger drop. The potential of the bigger drop will be _____ V.
- The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the resistance...
- If Z = A^2B^3 C^4 , then the relative error in Z will be
- A is a vector quantity such that | A | = non-zero constant. Which of the following expression is true for A ?
- If force F = 3 i + 4 j - 2 k acts on a particle having position vector 2 i + j + 2 k then, the torque about the origin will be
- The height of any point P above the surface of earth is equal to diameter of earth. The value of acceleration due to gravity at...
- The terminal velocity (v_ t ) of the spherical rain drop depends on the radius (r) of the spherical rain drop as
- The relation between root mean square speed (v_rms) and most probable speed (v_p) for the molar mass M of oxygen gas molecule at...
- Match List-I with List-II List-I: (1) AC generator (2) Galvanometer (3) Transformer (4) Metal detector List-II: (I) Detects the...
- A long straight wire with a circular cross-section having radius R, is carrying a steady current I. The current I is uniformly...
- If wattless current flows in the AC circuit, then the circuit is :
- The electric field in an electromagnetic wave is given by E = 56.5 sin (t − x/c) NC^ -1 . Find the intensity of the wave if it is...
- The two light beams having intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between...