The output characteristics of a transistor is shown in the figure. When VCE is 10V and IC = 4.0 mA, then the value of βac is __________.... View Article
The centre of mass of the solid hemisphere of radius 8 cm is x from the centre of the flat surface. Then the value of x is __________. Answer: 3... View Article
A Young's double-slit experiment is performed using monochromatic light of wavelength λ. The intensity of light at a point on the screen,... View Article
A particle moving in the xy plane experiences a velocity-dependent force, where vx and vy are the x and y components of its velocity v. If a is... View Article
Given the masses of various atomic particles mp = 1.0072 u, mn = 1.0087 u, me = 0.000548 u, mv[bar] = 0, md = 2.0141 u, where p ≡ proton, n... View Article
A student measuring the diameter of a pencil of circular cross-section with the help of a vernier scale records the following four readings 5.50... View Article
1) 0.21 A from positive to the negative terminal 2) 0.36 A from negative to the positive terminal 3) 0.42 A from positive to the negative... View Article
Two planets have masses M and 16 M and their radii are a and 2a, respectively. The separation between the centres of the planets is 10a. A body... View Article
Two identical electric point dipoles have dipole moments p1 = pi and p1 = -pi are held on the x-axis at distance 'a' from each other. When... View Article
Consider the force F on a charge 'q' due to a uniformly charged spherical shell of radius R carrying charge Q distributed uniformly over it.... View Article
Assuming the nitrogen molecule is moving with r.m.s. velocity at 400 K, the de-Broglie wavelength of nitrogen molecule is close to (Given:... View Article
Three rods of identical cross-section and lengths are made of three different materials of thermal conductivity K1, K2 and K3, respectively. They... View Article
When a particle of mass m is attached to a vertical spring of spring constant k and released, its motion is described by y (t) = y0 sin2... View Article
A square loop of side 2a and carrying current I is kept in the xz plane with its centre at the origin. A long wire carrying the same current I is... View Article
A charged particle going around in a circle can be considered to be a current loop. A particle of mass m carrying charge q is moving in a plane... View Article
When a car is at rest, its driver sees raindrops falling on it vertically. When driving the car with speed v, he sees that raindrops are coming... View Article
