Physics questions
20027 published questions with worked solutions.
- I_ CM is the moment of inertia of a circular disc about an axis (CM) passing through its center and perpendicular to the plane of...
- A ray of light is incident from air on a glass plate having thickness 3cm and refractive index 2. The angle of incidence of a ray...
- The wavelength of the radiation emitted is _0 when an electron jumps from the second excited state to the first excited state of...
- The time period of a satellite of earth is 24 hours. If the separation between the earth and the satellite is decreased to one...
- A force acts for 20 s on a body of mass 20 kg, starting from rest, after which the force ceases and then body describes 50 m in...
- The ratio of de-Broglie wavelength of an particle and a proton accelerated from rest by the same potential is 1 m , the value of...
- At 300 K, the rms speed of oxygen molecule is +5 times to that of its average speed in the gas. Then, the value of will be (used...
- Heat energy of 184 kJ is given to ice of mass 600 g at –12°C. Specific heat of ice is 2222.3 J kg^ -1 °C^ -1 and latent heat of...
- With the help of potentiometer, we can determine the value of emf of a given cell. The sensitivity of the potentiometer is (A)...
- A point charge 2 10^ -2 C is moved from P to S in a uniform electric field of 30 NC^ -1 directed along positive x-axis. If...
- A square loop of area 25 cm^2 has a resistance of 10 . The loop is placed in uniform magnetic field of magnitude 40.0 T. The...
- Given below are two statements: Statement I : Electromagnetic waves are not deflected by electric and magnetic field. Statement...
- Identify the correct statements from the following: A. Work done by a man in lifting a bucket out of a well by means of rope tied...
- A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he...
- The modulation index for an A.M. wave having maximum and minimum peak-to-peak voltages of 14 mV and 6 mV respectively isNot in JEE or NEET syllabus
- The equation of a circle is given by x^2+y^2=a^2, where a is the radius. If the equation is modified to change the origin other...
- An object moves at a constant speed along a circular path in a horizontal plane with centre at the origin. When the object is at...
- The electric current in a circular coil of four turns produces a magnetic induction 32 T at its centre. The coil is unwound and...
- When two resistances R_1 and R_1 connected in series and introduced into the left gap of a meter bridge and a resistance of 10 is...
- For a charged spherical ball, electrostatic potential inside the ball varies with r as V = 2ar^2+b. Here a and b are constant and...