List of top Physics Questions

If a force \( \vec{F} = (3\hat{i} + 2\hat{j} + 5\hat{k})~\text{N} \) acting on a body displaces it through \( \vec{d} = (2\hat{i} + 2\hat{j} + 1\hat{k})~\text{m} \), then the work done by the force on the body is
If two bodies A and B are projected with same velocity but with different angles \( \theta_1 \) and \( \theta_2 \) respectively with the horizontal such that both will have same range, then the ratio of times of flight of the bodies A and B is
If a stone of mass \( 0.5~\text{kg} \) tied to one end of a wire is whirled in a circular path of radius \( 2~\text{m} \) with a speed \( 40~\text{rev/min} \) in a horizontal plane, then the tension in the wire is nearly
If the displacement \( s \) (in metre) of a moving particle in terms of time \( t \) (in second) is \( s = t^3 - 6t^2 + 18t + 9 \), then the minimum velocity attained by the particle is
In a common emitter transistor amplifier the resistance of collector is 3 kΩ. If the current amplification factor is 100 and the base resistance is 2 kΩ, then the power gain of the transistor is
The layer of the atmosphere that reflects low frequency (LF) electromagnetic waves during daytime only is
If the surface areas of two nuclei are in the ratio 9 : 49, then the ratio of their mass numbers is
In the given options, the diode that is forward biased is
The ratio of the time periods of the revolution of the electrons in the second and third excited states of hydrogen atom is
In a series LCR circuit, the voltages across the capacitor, resistor, and inductor are in the ratio 2:3:6. If the voltage of the source in the circuit is 240 V, then the voltage across the inductor is
When current in a coil changes from 2 A to 5 A in a time of 0.3 s, if the emf induced in the coil is 40 mV, then the self-inductance of the coil is
The ratio of de Broglie wavelengths associated with thermal neutrons at temperatures 127°C and 352°C is
If a 10 W bulb emits electromagnetic waves uniformly in all directions, then the intensity of light at a distance 0.5 m from the source is nearly
The magnetic field at the center of a long solenoid having 400 turns per unit length and carrying a current $I = 6.24 \times 10^{-7$ A is}
If a proton of kinetic energy 8.35 MeV enters a uniform magnetic field of 10 T at right angles to the direction of the field, then the force acting on the proton is
A capacitor of capacitance 2 μF is charged with the help of a 60 V battery. After disconnecting the battery, if this capacitor is connected in parallel with another uncharged capacitor of capacitance 1 μF, then the potential difference across the plates of the 2 μF capacitor is
The readings of the voltmeter and ammeter in the circuit shown in the diagram are respectively
readings of the voltmeter and ammeter
When two identical batteries of internal resistance 1 Ω each are connected in series across a resistor R, the rate of heat produced in R is P1. When the same batteries are connected in parallel across R, the rate of heat produced is P2. If P1 = 2P2, then the value of R is
When an object is placed in front of a convex mirror at a distance 'u' from the pole of the mirror such that the size of the image is 'n' times that of the object, then the object distance 'u' is
The equation of a transverse wave propagating along a stretched string of length 80 cm is $y = 1.5 \sin ( (5 \times 10^3)x + 20t )$, here 'x' and 'y' are in cm and the time 't' is in seconds. If the mass of the string is 3 g, then the tension in the string is
If the rms speed of the molecules of a diatomic gas at a temperature of 322K is 2000 m/s, then the gas is
The force between two conducting spheres of same radius having charges +8 μC and -4 μC separated by some distance in air is F. If the spheres are connected by a conducting wire and after some time the wire is removed, then the magnitude of the force between the two conducting spheres is
A narrow slit of width 2 mm is illuminated with monochromatic light of wavelength 500 nm. If the distance between the slit and the screen is 1 m, then first minima are separated by a distance of
The potential energy of a satellite of mass \( m \) revolving around the earth at a height of \( R \) from the surface of the earth is:
If the ratio of universal gas constant and specific heat capacity at constant volume of a gas is given by 0.67, then the gas is