Recently Active Physics Questions

1) angular speed of a planet is smallest at farthest point form sun in elliptical orbit 2) angular velocity is characterisitc of rigid body at a whole 3) Two binary starts having mass Ma and Mb and radius Ra and Rb moving in ...

how to find the no. of maximas in the screen if the wavelength is given? ...

*Image* what type of wave is "the wave" shown in above figure? ...

3 charges 3q,q and Q are placed on straight line with equal separation. in order to make net force on q to be zero.. the value of Q will be???? ...

Column I 1. A fully discharged capaciter battery of constant Emf. is connected to the end of the wire 2. The wire is rotated about one end of its length with constant angular velocity in a uniform magnetic field perpendicular ...

1. Statement-I : The sensitiviry of a moving coil galvanometer is increased by placing a suitable megnetic material as a core in side the will. Statement-II : Soft iron has ligh megnetic permeability and can not be easily meg ...

The threshold frequency for certain metal is 3 × 10^14 Hz. If light of frequency 8.2 × 10^14 Hz is incident on the metal, predict the cut off voltage for photoelectric emission. ...

A straight wire carries a current of 3 A. Calculate the magnifield of the magnitic field at a point 10 emp. away from the wire. ...

Name two factors which determine the choice of a communication channel. Explain the use ofcoaxial cables as a communication channel with the help of its simple diagram. What are the advantages of coaxial cable? ...

State the principle of potantionant. ...

1. 7 rods A,B,C,D,E,F,G are joined in the form of 2 adjacent rectangles with F as the common side. Rectangle AECF and BGDF(Clockwise).All rods have equal cross sectional area A and equal length l.The thermal conductivities of ...

Wats power electron?????? ...

A bimolecular elementary reaction must be of second order [127] ...

1) 4 point masses A,B,C,D are placed at coplanar but non collinear points,If P is centre of mass of A,B,C,D ..identify correct statements a)P must lie within quad ABCD b)P must lie on a line joining any of two points A,B,C,D ...

*Image* ...

1.someone please help me out on this type of Q: when one side of a convex lens (of some given radius of curvature) is silvered and the object distance, refractive index of glass of lens is given. And we have to find the image ...

Q1. *Image* θ = 45° (Q1) Q2. *Image* ...

A table with smooth horizontal surface is turning at an angular speed w abt its axis a groove is made on the surface along a radius and a particle is gently placed inside the groove at a distance a from the centre Find the sp ...

1.what will be the graph of varition of the magnitude of radial accerleration with time for a particle projected at t=0 with speed vo at an angle \Theta above the horizontal??? 2.what will be tha graph of vation of the magnit ...

1. Light emitting diode a) emits light when forward biased b) Is made from semiconducting compound gallium arsenide c) is made of one of the two basic semi conducting material Si and Ge d) emits light when reverse biased 2. W ...

A bridge network ABCD are arranged as follows... resistances b/e terminals A-B, B-C, C-D, D-A and B-D are 10, 20, 15, 5 and 40 ohms respectively. A 20V battery of negligible internal resistance is connected b/w terminals A an ...

Q1. Two blocks of mass m and 2m respectively are placed on smooth horizontal ground connected by a spring of spring const. K. Initially the spring is unstretched. (natural length L) m is on the left and 2m is on the right m i ...

Two identical blocks are released from the top of two fixed wedges of same height(h) and same base length (l). The speeds of the blocks when they reach the ground are related by( k is the coefficient of friction in both) (A) ...

A uniform rigid quarter circular ring of radius R and center O is fixed to horizontal roof OX and vertical wall OY. *Image* Let the horizontal component of reaction of roof on ring at A be equal to R1 and the horizontal compo ...

Centrifugal force is reactionary force of centripetal force. ...

1.Plaskett's binary system consists of two stars that revolve in a circular orbit about a centre of gravity midway between them.This means that the masses of the two stars are equal if the orbital speed of each star is V and ...

An organ produces a G note with an intensity of 10-6 W/m2. What is the sound level of this G note? a. 6 dB b. 18 dB c. 60 dB d. 120 dB ans (c) ...

A potential diff. of 2 V is applied to a coil of resistance 2 ohm and inductance 2 H. What is the current after 1 second? a) 0.732 A b)0.632 A c)0.932 A d)0.693 A ...

1. STATEMENT1--for achromatic combination of lenses ,nature of lenses should be opposite .i.e. one converging and the other diverging STATEMENT2.---relation between dispersive powers and focal length is w1/f1 +w2/f2=0 to remo ...

*Image* A small bucket of mass M is attached to a long inextensible cord of length :L as shown in fig. The bucket is released from its lowest position, the bucket scoops up mass m and swing to a height h. The height h is A. L ...