Physics questions
20027 published questions with worked solutions.
- An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The...
- The focal length f is related to the radius of curvature r of the spherical convex mirror by:
- A current through a wire depends on time as i = _0t + t^2 where _0 = 20 A/s and = 8 As^ -2 . Find the charge crossed through a...
- Moment of inertia (M.I.) of four bodies, having same mass and radius, are reported as ; I_1 = M.I. of thin circular ring about...
- Given below are two statements : Statement-I : Two photons having equal linear momenta have equal wavelengths. Statement-II : If...
- If Y, K and are the values of Young's modulus, bulk modulus and modulus of rigidity of any material respectively. Choose the...
- Four identical particles of equal masses 1kg made to move along the circumference of a circle of radius 1 m under the action of...
- Match List-I with List -II : List-I: (a) Isothermal (b) Isochoric (c) Adiabatic (d) Isobaric List-II: (i) Pressure constant (ii)...
- The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2. The magnitude of...
- A resonance circuit having inductance and resistance 2 10^ -4 H and 6.28 respectively oscillates at 10 MHz frequency. The value...
- An electromagnetic wave of frequency 5 GHz, is travelling in a medium whose relative electric permittivity and relative magnetic...
- An audio signal = 20 sin2 (1500 t) amplitude modulates a carrier _c = 80 sin2 (100,000 t). The value of percent modulation is...Not in JEE or NEET syllabus
- A common transistor radio set requires 12V (D.C.) for its operation. The D.C. source is constructed by using a transformer and a...
- An unpolarized light beam is incident on the polarizer of a polarization experiment and the intensity of light beam emerging from...
- A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that is...
- A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle θ. The frictional force :
- Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the...
- Which of the following circular rods, (given radius r and length l) each made of the same material and whose ends are maintained...
- Energy levels A, B and C of a certain atom correspond to increasing values of energy i.e., E_ A <E_ B <E_ C . If _ 1 , _ 2 and _...
- The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation, the metals...