JIPMER Physics Mock Test - 7 - NEET MCQ

Putting a dielectric substance between two plates of a condenser, the capacity, potential and potential energy respectively

A conductor rod of length L rotates with angular speed ω in a uniform magnetic field of induction B which is perpendicular to its motion. The induced e.m.f developed between the two ends of the rod is

For a coil having L=2 mH, current flows at the rate of 10^-3 ampere/sec. The emf induced is

For a cell terminal potential difference is 2.2 V When circuit is open and reduces to 1.8 V when cell is connected to a resistance of R=5 Ω. Determine the internal resistance of the cell (r)

A wire of resistance 1 Ω is stretched to double its length. The resistance will become

Two point charges of +4 μC and -6 μC are separated by a distance of 20 cm in air. At what point, on the line joining the two charges from charge +4 μC, the electric potential will be zero?

The ozone layer absorbs

A parallel plate capacitor is made by stacking n equally spaced plates connected alternatively. If capacitance between any two adjacent plates is C, then the resultant capacitance is

Average density of the earth

If the angular speed of the earth is doubled, the value of acceleration due to gravity at the north pole

The horizontal acceleration that should be given to a smooth inclined plane of angle sin^-1 (1/l)  to keep an object stationary on the plane, relative to the inclined plane is

Which of the following is the best example of an ideal black body?

In Young's double slit expt., distance between sources is 1 mm and distance between the screen and sources is 1 m. If the fringe width on the screen is 0.06 cm, then λ is

A particle of mass m and charge q moves with a constant velocity ν along the positive x-direction. It enters a region containing a uniform magnetic field B directed along the negative z-direction, extending from x = ato x = b. The minimum value of ν required so that the particle can just enter the region x>b is

A beam of electrons passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move

A particle moving in a magnetic field has increase in its velocity, then its radius of the circle

A diamagnetic material in a magnetic field moves

Kinetic theory of gases was put forward by

Work done in turning a magnet of magnetic moment M by an angle of 90^o from the magnetic meridian is n times the corresponding work done to turn through an angle of 60^o, where n is

To shield an instrument from external magnetic field, it is placed inside a cabin made of

The application of Bernoulli theorem can be seen in

Oil spreads over the surface of water, whereas water does not spread over the surface of oil, because

The extension in a string, obeying the Hooke's law, is x. The speed of sound in the stretched string is v. If the string is extended to 1.5 x, then speed of sound will be

A ball falls from a height of 200 m. then the distance travelled by it during the first 3 consecutive seconds in the ratio of

A flywheel rotating about a fixed axis has a kinetic energy of 360 joule when its angular speed is 30 rad/sec. The moment of inertia of the wheel about the axis of rotation is

In the above problem, if the lift moves up with a constant velocity of 2 m/sec, the reading on the balance will be

In a fission of U²³⁵ nucleus on average ----- neutrons are released.