Physics questions
20027 published questions with worked solutions.
- A steel wire of diameter 0.5 mm and Young's modulus 2 10^ 11 N ,m^ -2 carries a load of mass M. The length of the wire with the...
- One mole of a monatomic ideal gas undergoes an adiabatic expansion in which its volume becomes eight times its initial value. If...
- In a photoelectric experiment a parallel beam of monochromatic light with power of 200 W is incident on a perfectly absorbing...
- Consider a spherical gaseous cloud of mass density (r) in free space where r is the radial distance from its center. The gaseous...
- A thin spherical insulating shell of radius R carries a uniformly distributed charge such that the potential at its surface is...
- A current carrying wire heats a metal rod. The wire provides a constant power (P) to the rod. The metal rod is enclosed in an...
- A charged shell of radius R carries a total charge Q. Given as the flux of electric field through a closed cylindrical surface of...
- Let us consider a system of units in which mass and angular momentum are dimensionless. If length has dimension of L, which of...
- Two identical moving coil galvanometers have 10 resistance and full scale deflection at 2 current. One of them is converted into...
- A parallel plate capacitor of capacitance C has spacing d between two plates having area A. The region between the plates is...
- A liquid at 30°C is poured very slowly into a Calorimeter that is at temperature of 110°C. The boiling temperature of the liquid...
- A thin and uniform rod of mass M and length L is held vertical on a floor with large friction. The rod is released from rest so...
- A mixture of ideal gas containing 5 moles of monatomic gas and 1 mole of rigid diatomic gas is initially at pressure P_0, volume...
- A free hydrogen atom after absorbing a photon of wavelength _a gets excited from the state n=1 to the state n=4. Immediately...
- An optical bench has 1.5 m long scale having four equal divisions in each cm. While measuring the focal length of a convex lens,...
- When a ray of light enters a glass slab, then
- A ball is thrown vertically upward from the ground with a speed of 25·2 m/s. The ball will reach the highest point of its journey...
- When sound waves are propagated through a medium, the physical quantity/quantities transmitted is/are
- Pressure is a scalar quantity because
- The free fall acceleration g increases as one proceeds, at sea level, from the equator toward either pole. The reason is