BITSAT Practice Test - 12 - JEE MCQ

A charged particle accelerated through a potential difference of 100V passes through the uniform electric and magnetic fields so as to experience no deflection. E = 15 x 10⁶ V ∕ m and B = 5 x 10³ T . The specific charge e/m is

A certain sample of gas has a volume of 0.2 L measured at 1 atm pressure and 0^oC. At the same pressure and at 273^oC temperature, its volume will be

A particle of charge 'q' and mass 'm' moving with a velocity 'V' enters into a uniform magnetic field of flux density 'B' acting perpendicular to the motion of the charge the radius of the circular path of particle is

24 cm³ of water flows per second through a capillary tube of radius r cm and length l cm, when connected to a pressure head h cm of water. If a tube of the length l/2 cm and radius r/2 cm is connected to the same pressure head, then volume of water flowing per second through the tube is

The excess pressure inside one soap bubble is three times that of a second bubble. The ratio of the volumes of the first bubble to that of second bubble is

A man stands in front of a hillock and fires a gun. He hears an echo after 1.5s. The distance of the hillock from the man is (velocity of sound in air is 330 m-s⁻¹)

The kinetic energy k of a particle moving along a circle of radius R depends on the distance covered s as K = as^₂ where a is a constant. The force acting on the particle is

Two simple harmonic motions with the same frequency act on a particle at right angles i.e., along x and y-axis. If the two amplitudes are equal and the phase difference is π/2, the resultant motion will be

The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius about a tangential axis in the plane of the ring is

Consider a system of two particles having masses m₁ and m₂. If the particle of mass m₁ is pushed towards the mass centre of particles through a distance d, by what distance would the particle of mass m₂ move, so as to keep the mass centre of the particles at the original position?

A wheel having moment of inertia 2 kg-m² about its vertical axis, rotates at the rate of 60 rev-min⁻¹ about this axis. The torque, which can stop the wheel's rotation in one minute, would be