List of practice Questions

For resonance condition in any L-C-R circuit, the phase-difference between applied voltage and current is
In step-up transformer, the value of current in secondary coil compared to primary coil is
X-rays are
The critical angle for total internal reflection of a ray from any medium to vacuum is 30\(^{\circ}\). Then velocity of light in the medium will be
Describe the two shortcomings of Bohr model of atom.
In a vertically upwards magnetic field \(\vec{B}\), a positively charged particle is projected horizontally eastwards. What will be the direction of force on the particle?
The coefficient of reflection for total internal reflection will be
The final image formed by a terrestrial telescope is
A spherical mirror is immersed in water. Its focal length will
The value of electric potential at a distance r from a point charge is
The relation between the drift velocity (\(V_d\)) and applied electric field (E) of a conductor is
64 identical drops each of capacity 5 µF combine to form a big drop. What will be the capacity of the big drop?
What is mainly measured by potentiometer?
If the distance between the two charges is increased, then the electrostatic potential energy of the charges
Two resistors R and 2R are connected in series in an electric circuit. The thermal energy developed in R and 2R will be in ratio
The symbol \(\rightarrow\!\!|\) is the symbol of
Unit of amplification factor of transistor is
Which one of the following logic gates is universal logic gate?
Waves of UHF frequency are generally transmitted as
The law, governing the force acting between two electric charges known as
A convex lens of focal length 40 cm and a concave lens of focal length 20 cm are in contact. The power of their combination in dioptre is
The reason for the phenomenon of interference is
Which is used to produce polarised light?
A charge 'q' placed at the centre on the line joining two charges 'Q' will be in equilibrium if 'q' will be equal to
What is the angle between the electric dipole moment \(\vec{p}\) and the electric field strength \(\vec{E}\) when the dipole is in a stable equilibrium?