List of top Physics Questions

A wire of length 1 m and radius 2 mm is having the lower end twisted at angle 45 degree. Find angle of shear.
 

The frequency of the television broadcasting is? 
 

The value of acceleration due to gravity g is maximum at?

Where will be the maximum rise in temperature if a body is heated?

The blue colour of the sky is due to ?

A plain polarized blue light ray is incident on a prism such that there is no reflection from the surface of the prism. The angle of deviation of the emergent ray is \(\delta\) = 60\(^{\circ}\) (figure 1). The angle of min. deviation for red light from the same prism is min \(\delta_{min}\) = 30\(^{\circ}\) (figure 2). If the refractive index of prism material for blue light is √3, then which of the following options is correct? 
A plain polarized blue light ray
PPBL = Plane Polarized Blue Light                 PPRL = Plane Polarized Red Light
 
S1 & S2 are sources of the sound of frequency 656 Hz. S1 is moving along OP and S2 is moving on the circle in an anticlockwise direction with a constant speed of 4√2 m\s. P is a detector that is fixed. Select the correct options (Vsound=300m\s)

circle in an anticlockwise direction
A thin conducting rod MN of mass 20 gm, length 25 cm, and resistance 10Ω is held on frictionless long perfectly conducting vertical rails as in the figure. There is the uniform magnetic field B0=4T directed perpendicular to the plane of the rod-rail arrangement. the rod is released from rest at time t=0 and it moves down along the rails assuming air drag is negligible. Match each quantity in L-I with an appropriate value from L-II and choose the correct options(g=10ms\(^{-2}\) and e\(^{-1}\)=0.4) 

A thin conducting rod
 
 
List-I
 
 List-II
(P)At t=0.2s, the magnitude of induced emf in volt(1)0.08
(Q)At t=0.2s, the magnitude of magnetic force in N(2)0.14
(R)At t=0.2s, the power dissipated at heat in watt(3)1.20
(S)The magnitude terminal velocity of the rod in ms\(^{-1}\)(4)0.12
  (5)2.00
The liquid is raising at a rate of 250\(cm^3s^{-1}\) in the container. Value of the capacitance of the container after 10 sec.? (\(\varepsilon_0=9 \times10^{12}C^2N^{-1}m^{-2}\))
liquid container
The system's center of mass is suspended by a steel wire of torsional spring
Two small particles of mass 20 gm and 30 gm are connected with a rigid massless rod of length of 10 cm. The system's center of mass is suspended by a steel wire of torsional spring constant \(c=1.2\times 10^{-8}\) N.m/rad. If the system is slightly rotated in its plane and the angular frequency of its oscillations in rad/sec is \(n\times 10^{-3}\), then write the value of n.

The Ratio of gravity field due to the earth at high hP and hQ from the earth's surface is \(\frac{g_{P}}{g_{Q}}=\frac{36}{25}.\) If \(h_P=\frac{R}{2}\), then the value of hQ will be

Viscosity is a property of?

Conversation of linear momentum is a necessary condition for which Kepler's laws?
Two inductors each of \(50mH\) are connected in parallel, what is the equivalent inductance?
The statement “velocity and acceleration always act through the same straight line, either in the same or opposite direction” applies for which dimensional motions?
If an object of mass m is given a velocity equal to twice the escape velocity of Earth then the velocity of the object at the point where Earth shows no Gravitational force strength would be at?
Quality factor: If R is halved keeping L, C same then Q becomes?
Work done in an isochoric process is always?
Mercury kept in the refrigerator has length L. If taken out in atmospheric pressure condition, length remains the same due to?
An air doubble is inside water (μ=\(\frac{4}{3}\)). At what distance from the air bubble should a point object be placed so as to form a real image at the same distance from the dubble? (r is the radius of curvature of the bubble)
An r.m.s voltage of 220 V is applied across a series circuit having a resistance of 100 ohm and an impedance of 22 ohm. the power consumed is:

In the following circuit $C_1=12 \mu F, C_2=C_3=4 \mu F$ and $C_4=C_5=2 \mu F$ The Charge stored in $C_3$ is ___$\mu C$

A thin convex lens object is placed in front of the lens. The distance of the object from the lens is 10\(\pm\)0.1 cm and the distance of the real image formed from the lens is 20\(\pm\)0.2cm. The error in the determination of the focal length of the lens is n%. The value of n is

A monochromatic light wave is incident normally on a glass slab of thickness 𝑑, as shown in the figure.The refractive index of the slab increases linearly from 𝑛1 to 𝑛2 over the height ℎ. Which of the following statement(s) is(are) true about the light wave emerging out of the slab?
A monochromatic light wave

A bullet of mass m and velocity v fired at the mass of sandbag M. The loss of kinetic energy in this process is ?