Physics questions
20027 published questions with worked solutions.
- Inductance of a coil with 10^4 turns is 10 mH and it is connected to a dc source of 10 V with internal resistance of 10 . The...
- If , E and t represent the free space permittivity, electric field and time respectively, then the unit of E t will be :
- Consider two boxes containing ideal gases A and B such that their temperatures, pressures and number densities are same. The...
- In parallax method for the determination of focal length of a concave mirror, the object should always be placed :
- In an open organ pipe v_3 and v_6 are 3^ rd and 6^ th harmonic frequencies, respectively. If v_6-v_3 = 2200 Hz then length of the...
- An electric power line having total resistance of 2 , delivers 1 kW of power of 250 V. The percentage efficiency of transmission...
- The wavelength of light, while it is passing through water is 540 nm. The refractive index of water is 4/3. The wavelength of the...
- Given below are two statements : Statement I: A satellite is moving around earth in the orbit very close to the earth surface....
- Given below are two statements : Statement I: An object moves from position r_1 to position r_2 under a conservative force field...
- A laser beam has intensity of 4.0 10^ 14 W/m². The amplitude of magnetic field associated with beam is ____ T. (Take _0=8.85 10^...
- Light is incident on a metallic plate having work function 110 10^ -20 J. If the produced photoelectrons have zero kinetic energy...
- Given below are two statements : Statement I: For a mechanical system of many particles total kinetic energy is the sum of...
- A conducting circular loop is rotated about its diameter at a constant angular speed of 100 rad/s in a magnetic field of 0.5 T...
- A capacitor P with capacitance 10 10^ -6 F is fully charged with a potential difference of 6.0 V and disconnected from the...
- A cylindrical conductor of length 2 m and area of cross-section 0.2 mm² carries an electric current of 1.6 A when its ends are...
- An insulated cylinder of volume 60 cm³ is filled with a gas at 27°C and 2 atmospheric pressure. Then the gas is compressed making...
- A thin prism with angle 5^ of refractive index 1.72 is combined with another prism of refractive index 1.9 to produce dispersion...
- Four persons measure the length of a rod as 20.00 cm, 19.75 cm, 17.01 cm and 18.25 cm. The relative error in the measurement of...
- The de Broglie wavelength of an oxygen molecule at 27^ is x 10^ -12 m. The value of x is (take Planck's constant = 6.63 10^ -34...
- A simple pendulum of string length 30 cm performs 20 oscillations in 10s. The length of the string required for the pendulum to...