List of top Physics Questions

Transfer characteristics (output voltage \( V_o \) vs input voltage \( V_i \)) for a base biased transistor in CE configuration is as shown in the figure. For using the transistor as a switch, it is used
A prism has a refracting angle of 60°. When placed in the position of minimum deviation, it produces a deviation of 30°. The angle of incidence is
A bar magnet of magnetic moment \( M \), is placed in a magnetic field of induction \( B \). The torque exerted on it is
On a smooth plane surface (figure) two block A and B are accelerated by up by applying a force 15 N. If mass of B is twice that of A, the force on B is
The velocity of efflux of a liquid through an orifice in the bottom of the tank does not depend upon
Resonance frequency of LCR series a.c. circuit is \( f_0 \). Now the capacitance is made 4 times, then the new resonance frequency will become
Graph of specific heat at constant volume for a monatomic gas is
Two capacitors when connected in series have a capacitance of 3 μF, and when connected in parallel have a capacitance of 16 μF. Their individual capacities are
A charge \( +q \) is at a distance \( L/2 \) above a square of side \( L \). Then what is the flux linked with the surface?
The potential energy of a system increases if work is done
If the light is polarised by reflection, then the angle between reflected and refracted light is
A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohms) of necessary shunt will be
Which of the following are not electromagnetic waves?
An A.C. source is connected to a resistive circuit. Which of the following is true?
An electron makes a transition from an excited state to the ground state of a hydrogen-like atom. Then
Which of the following is a self-adjusting force?
In Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is \( \frac{\lambda}{4} \), will be
The value of \( \tan(90^\circ - \theta) \) in the graph gives
Resistances 1 \( \Omega \), 2 \( \Omega \), and 3 \( \Omega \) are connected to form a triangle. If a 1.5 V cell of negligible internal resistance is connected across the 3 \( \Omega \) resistor, the current flowing through this resistor will be
The combination of gates shown below yields
Two mercury drops (each of radius \( r \)) merge to form a bigger drop. The surface energy of the bigger drop is, if \( T \) is the surface tension, is
An alternating voltage of 220 V, 50 Hz frequency is applied across a capacitor of capacitance 2 μF. The impedance of the circuit is
A current carrying coil is subjected to a uniform magnetic field. The coil will orient so that its plane becomes
A hollow insulated conduction sphere is given a positive charge of 10 μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?
Kerosene oil rises up in a wick of a lantern because of