Q. A liquid flows through a pipe of non-uniform cross-section. If and arc the cross-sectional areas of the pipe at two points, the ratio of velocities of the liquid at these points will be :

WBJEE WBJEE 2006 Report Error

A

B

C

D

Solution:

Volume of liquid flowing at first point Similarly, volume of liquid flowing at second point From equation of continuity, or

Questions from WBJEE 2006

1. The SI unit of gravitational potential is:

2. The magnitude of a vector, on the addition of two vectors and is :

3. The potential energy of a particle varies with distance x from a fixed origin as where A and B are constants. The dimensions of A B are:

4. The acceleration experienced by a moving boat after its engine is cut off, is given by where k is a constant. If is the magnitude of velocity at cut off, then the magnitude of the velocity at time t after the cut off is :

5. A passenger train is moving at An express train is travelling at on the same track and rear side of the passenger tsrain at some distance. The driver in express train applied brakes to avoid collision. If the retardation due to brakes is the time in which the accident is avoided after the application of brakes is :

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

NEET 2021 Physical World, Units and Measurements

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

NEET 2020 Dual Nature of Radiation and Matter

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

NEET 2021 Motion in a Straight Line

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

NEET 2020 Electromagnetic Induction

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

NEET 2020 Mechanical Properties of Fluids

Latest Updates