Physics questions
20027 published questions with worked solutions.
- An AC circuit has R = 100 , C = 2 and L = 80 mH, connected in series. The quality factor of the circuit is -
- You are given that mass of ^7_3Li = 7.0160 u, mass of ^4_2He = 4.0026 u, and mass of ^1_1H = 1.0079 u. When 20 g of ^7_3Li is...
- An object of mass m is suspended at the end of a massless wire of length L and area of cross-section, A. Young modulus of the...
- Molecules of an ideal gas are knows to have three translational degrees of freedom and two rotational degrees of freedom. The gas...
- An insect is at the bottom of a hemispherical ditch of radius 1m. It crawls up the ditch but starts slipping after it is at...
- A screw gauge has 50 divisions on its circular scale. The circular scale is 4 units ahead of the pitch scale marking, prior to...
- A particle of charge q and mass m is moving with a velocity v i (v > 0) towards a large screen placed in the Y–Z plane at a...
- A point like object is placed at a distance of 1 m in front of a convex lens of focal length 0.5 m. A plane mirror is placed at a...
- An electron is moving along +x direction with a velocity of 6 10^6 ms ^ -1 . It enters a region of uniform electric field of 300...
- If the potential energy between two molecules is given by U=- A r^6 + B r^ 12 , then at equilibrium, separation between...
- An electron, doubly ionized helium ion (He^ ++ ) and a proton are having the same kinetic energy. The relation between their...
- A clock has a continuously moving second's hand of 0.1 m length. The average acceleration of the tip of the hand (in units of ms...
- Two bodies of the same mass are moving with the same speed, but in different directions in a plane. They have a completely...
- Initially a gas of diatomic molecules is contained in a cylinder of volume V_1 at a pressure P_1 and temperature 250 K. Assuming...
- Suppose that intensity of a laser is ( 315 ) W/ m ^2. The rms electric field, in units of V/m associated with this source is...
- The density of a solid metal sphere is determined by measuring its mass and its diameter. The maximum error in the density of the...
- Two planets have masses M and 16 M and their radii are a and 2a, respectively. The separation between the centres of the planets...
- For a plane electromagnetic wave, the magnetic field at a point x and time t is B (x,t)= [1.2 10^ -7 (0.5 10^3x+1.5 10^ 11 t) k...
- A double convex lens has power P and same radii of curvature R of both the surfaces. The radius of curvature of a surface of a...
- A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the...