A spherical mirror is obtained as shown in the figure from a hollow glass sphere. If an object is positioned in front of the mirror, what will be... View Article
The circuit shown below is working as a 8V dc regulated voltage source. When 12V is used as input, the power dissipated (in mW) in each diode id;... View Article
In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing length is l = 25 cm. If R is replaced... View Article
In a Young’s double slit experiment 15 fringes are observed on a small portion of the screen when light of wavelength 500nm is used. 10... View Article
The current (i) in the network is a. 0A b. 0.3 A c. 0.2 A d. 0.6 A Since the diodes are reverse biased, they will not conduct. Hence, the... View Article
In LC circuit the inductance L = 40mH and C = 100 μF. If a voltage V(t) = 10sin(314t) is applied to the circuit, the current in the circuit is... View Article
An electron of mass m and magnitude of charge |e| initially at rest gets accelerated by a constant electric field E. The of charge of de-Broglie... View Article
There is a small source of light at some depth below the surface of water (refractive index 4/3) in a tank of large cross sectional surface area.... View Article
The energy required to ionise a hydrogen like ion in its ground state is 9 Rydbergs. What is the wavelength of the radiation emitted when the... View Article
A uniformly thick wheel with moment of inertia I and radius R is free to rotate about its center of mass (see fig). A massless string is wrapped... View Article
A particle of mass m is projected with a speed u from the ground at angle is θ = π/3 w.r.t. horizontal (x-axis). When it has reached its maximum... View Article
Planets A has a mass M and radius R. Planet B has the mass and half the radius of planet A. If the escape velocities from the planets A and B are... View Article
Two steel wires having same length are suspended from a ceiling under the same load. If the ratio of their energy stored per unit volume is 1: 4,... View Article
Two gases-Argon (atomic radius 0.07 nm atomic weight 40) and Xenon (atomic radius 0.1 nm atomic weight 140) have the same number density and are... View Article
A plane electromagnetic wave is propagating along the direction .The correct form of the magnetic field of the wave would be ( here B0 is an... View Article
A wire of length L and mass 6 x 10-3 kg/m per unit length is put under tension of 540N. Two consecutive frequencies that it resonates at are: 420... View Article
