Physics questions
20027 published questions with worked solutions.
- A nucleus A, with a finite de-Broglie wavelength _A, undergoes spontaneous fission into two nuclei B and C of equal mass. B flies...
- The magnetic field of an electromagnetic wave is given by B = 1.6 10^ -6 (2 10^ 7 z + 6 10^ 15 t)(2 i + j) Wb m ^2 . The...
- A parallel plate capacitor has 1 μF capacitance. One of its two plates is given +2 μC charge and the other plate, +4 μC charge....
- A convex lens (of focal length 20 cm) and a concave mirror, having their principal axes along the same lines, are kept 80 cm...
- An electric dipole is formed by two equal and opposite charges q with separation d. The charges have same mass m. It is kept in a...
- A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external...
- Calculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength...
- A circuit connected to an ac source of emf e = e_0 (100t) with t in seconds, gives a phase difference of 4 between the emf e and...
- A body of mass m_1 moving with an unknown velocity of v_1 i, undergoes a collinear collision with a body of mass m_2 moving with...
- The ratio of mass densities of nuclei of ^ 40 Ca and ^ 16 O is close to:
- For a given gas at 1 atm pressure, rms speed of the molecules is 200 m/s at 127ºC. At 2 atm pressure and at 227ºC, the rms speed...
- A stationary horizontal disc is free to rotate about its axis. When a torque is applied on it, its kinetic energy as a function...
- The pressure wave, P = 0.01 [1000t - 3x] Nm^ -2 , corresponds to the sound produced by vibrating blade on a day when atmospheric...
- The stream of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of...
- A uniform cable of mass 'M' and length 'L' is placed on a horizontal surface such that its ( 1 n )^ th part is hanging below the...
- A rectangular coil (Dimension 5 cm × 2.5 cm) with 100 turns, carrying a current of 3 A in the clock-wise direction, is kept...
- The electric field of light wave is given as E = 10^ -3 ( 2 x 5 10^ -7 - 2 6 10^ 14 t ) x N C . This light falls on a metal plate...
- A moving coil galvanometer has resistance 50 Ω and it indicates full deflection at 4 mA current. A voltmeter is made using this...
- Taking the wavelength of first Balmer line in hydrogen spectrum (n = 3 to n = 2) as 660 nm, the wavelength of the 2nd Balmer line...
- If 'M' is the mass of water that rises in a capillary tube of radius 'r', then mass of water which will rise in a capillary tube...