Physics questions
20027 published questions with worked solutions.
- A solid disc of radius 20 cm and mass 10 kg is rotating with an angular velocity of 600 rpm, about an axis normal to its circular...
- In a semiconductor, the number density of intrinsic charge carriers at 27°C is 1.5 10^ 16 /m^3. If the semiconductor is doped...Not in JEE Advanced syllabus
- The half-life of radioactive element is _____.
- For a gas C_P-C_V = R in a state P and C_P-C_V = 1.10 R in a state Q, T_P and T_Q are the temperatures in two different states P...
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Moment of...
- What should be the order of arrangement of de-Broglie wavelength of electron ( _e), an -particle ( _ ) and proton ( _p) given...
- Some nuclei of a radioactive material are undergoing radioactive decay. The time gap between the instances when a quarter of the...
- A parallel plate capacitor with plate area 'A' and distance of separation 'd' is filled with a dielectric. What is the capacity...
- A monoatomic ideal gas, initially at temperature T_1 is enclosed in a cylinder fitted with a frictionless piston. The gas is...
- A ray of laser of a wavelength 630 nm is incident at an angle of 30° at the diamond-air interface. It is going from diamond to...
- Two wires of same length and radius are joined end to end and loaded. The Young's modulii of the materials of the two wires are...
- The half-life of ^ 198 Au is 3 days. If atomic weight of ^ 198 Au is 198 g/mol then the activity of 2 mg of ^ 198 Au is [in...
- In the Young's double slit experiment, the distance between the slits varies in time as d(t)=d_0+a_0 t; where d_0, and a_0 are...
- A linearly polarized electromagnetic wave in vacuum is E=3.1 [(1.8)z-(5.4 10^6)t] i N/C is incident normally on a perfectly...
- In amplitude modulation, the message signal V_ m(t) =10 (2 10^5t)volts and Carrier signal V_ c(t) =20 (2 10^7t)volts. The...Not in JEE or NEET syllabus
- Water droplets are coming from an open tap at a particular rate. The spacing between a droplet observed at 4^ th second after its...
- The minimum and maximum distances of a planet revolving around the Sun are x_1 and x_2. If the minimum speed of the planet on its...
- A body of mass 2 kg moving with a speed of 4 m/s. makes an elastic collision with another body at rest and continues to move in...
- Student A and Student B used two screw gauges of equal pitch and 100 equal circular divisions to measure the radius of a given...
- An inductor of 10 mH is connected to a 20 V battery through a resistor of 10 k and a switch. After a long time, when maximum...