Physics questions
20027 published questions with worked solutions.
- A series LCR circuit with R = 5 , L = 20 mH and C = 0.5 is connected across an AC supply of 250 V, having variable frequency. The...
- A certain metallic surface is illuminated by monochromatic radiation of wavelength . The stopping potential for photoelectric...
- A body rotating with an angular speed of 600 rpm is uniformly accelerated to 1800 rpm in 10 sec. The number of rotations made in...
- A radioactive substance decays to ( 1 16 )^ th of its initial activity in 80 days. The half life of the radioactive substance...
- The normal reaction 'N' for a vehicle of 800 kg mass, negotiating a turn on a 30° banked road at maximum possible speed without...
- A radioactive material decays by simultaneous emissions of two particles with half lives 1400 years and 700 years respectively....
- AC voltage V(t) = 20 sin of frequency 50 Hz is applied to a parallel plate capacitor. The separation between the plates is 2 mm...
- The amount of heat needed to raise the temperature of 4 moles of a rigid diatomic gas from 0°C to 50°C when no work is done is...
- A deuteron and an alpha particle having equal kinetic energy enter perpendicular into a magnetic field. Let r_d and r_ be their...
- A nucleus of mass M emits -ray photon of frequency ' '. The loss of internal energy by the nucleus is : [Take 'c' as the speed of...
- A certain charge Q is divided into two parts q and (Q – q). How should the charges Q and q be divided so that q and (Q – q)...
- A current of 5 A is passing through a non-linear magnesium wire of cross-section 0.04 m^2. At every point the direction of...
- Consider a mixture of gas molecule of types A, B and C having masses m_A<m_B<m_C. The ratio of their root mean square speeds at...
- A butterfly is flying with a velocity 4 2 m/s in North-East direction. Wind is slowly blowing at 1 m/s from North to South. The...
- The value of tension in a long thin metal wire has been changed from T_1 to T_2. The lengths of the metal wire at two different...
- The radiation corresponding to 3 2 transition of a hydrogen atom falls on a gold surface to generate photoelectrons. These...
- In an LCR series circuit, an inductor 30 mH and a resistor 1 are connected to an AC source of angular frequency 300 rad/s. The...
- The amplitude of wave disturbance propagating in the positive x-direction is given by y= 1 (1+x)^2 at time t = 0 and y= 1...
- A circular disc reaches from top to bottom of an inclined plane of length 'L'. When it slips down the plane, it takes time 't_1'....
- A rod of mass M and length L is lying on a horizontal frictionless surface. A particle of mass 'm' travelling along the surface...