Physics-
General
Easy
Question
A conductor has a non-uniform section as shown in the figure A steady current is flowing through it Then the drift speed of the electrons
- is constant throughout the wire
- varies unpredictably
- decreases from P & Q
- increases from P to Q
The correct answer is: decreases from P & Q
Related Questions to study
physics-
Certain plane wavefronts are shown in figure. The refractive index of medium is
Certain plane wavefronts are shown in figure. The refractive index of medium is
physics-General
physics-
Plane wave fronts are incident on a spherical mirror as shown in the figure. The reflected wave fronts will be
Plane wave fronts are incident on a spherical mirror as shown in the figure. The reflected wave fronts will be
physics-General
physics-
Wavefronts incident on an interface between the media are shown in the figure. The refracted wavefront will be as shown in
Wavefronts incident on an interface between the media are shown in the figure. The refracted wavefront will be as shown in
physics-General
physics-
Spherical wavefronts shown in figure, strike a plane mirror. Reflected wavefront will be as shown in
Spherical wavefronts shown in figure, strike a plane mirror. Reflected wavefront will be as shown in
physics-General
physics-
The figure shows the interference pattern obtained in a double–slit experiment using light of wavelength 600nm.
The third order bright fringe is
The figure shows the interference pattern obtained in a double–slit experiment using light of wavelength 600nm.
The third order bright fringe is
physics-General
physics-
The optical path length followed by ray from point A to B given that laws of reflection are obeyed as shown in figure is
The optical path length followed by ray from point A to B given that laws of reflection are obeyed as shown in figure is
physics-General
physics-
The optical path length followed by ray from point A to B given that laws of refraction are obeyed as shown in figure
The optical path length followed by ray from point A to B given that laws of refraction are obeyed as shown in figure
physics-General
physics-
In the figure an arrangement of young's double slit experiment is shown. A parallel beam of light of wavelength 
(in medium 
) is incident at an angle 
as shown. Distance 
. Point 'O' is the origin of the coordinate system. The medium on the left and right side of the plane of slits has refractive index and 
respectively. Distance between the slits is d. The distance between the screen and the plane of slits is D Using 
answer the following
The y-coordinate of the point where the total phase difference between the interefering waves is zero, is
In the figure an arrangement of young's double slit experiment is shown. A parallel beam of light of wavelength (in medium ) is incident at an angle as shown. Distance . Point 'O' is the origin of the coordinate system. The medium on the left and right side of the plane of slits has refractive index and respectively. Distance between the slits is d. The distance between the screen and the plane of slits is D Using answer the following
The y-coordinate of the point where the total phase difference between the interefering waves is zero, is
physics-General
physics-
Statement–1: Two point coherent sources of light S1 and S2 are placed on a line as shown. P and Q are two points on that line. If at point P maximum intensity is observed then maximum intensity should also be observed at Q
Statement–2: In the figure of statement 1, the distance |S1 P – S2 P| is equal to distance |S2Q – S1Q|.
Statement–1: Two point coherent sources of light S1 and S2 are placed on a line as shown. P and Q are two points on that line. If at point P maximum intensity is observed then maximum intensity should also be observed at Q
Statement–2: In the figure of statement 1, the distance |S1 P – S2 P| is equal to distance |S2Q – S1Q|.
physics-General
physics-
In an interfrence arrangement similar to Young's double- slit experiment, the slits 
are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of 
, where is defined as shown. Screen is at a large distance. If 
is the maximum intensity then I () for 
is given by:
In an interfrence arrangement similar to Young's double- slit experiment, the slits are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of , where is defined as shown. Screen is at a large distance. If is the maximum intensity then I () for is given by:
physics-General
physics-
In an interfrence arrangement similar to Young's double- slit experiment, the slits are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of , where is defined as shown. Screen is at a large distance. If is the maximum intensity then I () for is given by:
In an interfrence arrangement similar to Young's double- slit experiment, the slits are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of , where is defined as shown. Screen is at a large distance. If is the maximum intensity then I () for is given by:
physics-General
physics-
A parallel beam of light 
is incident at an angle 
with the normal to the slit plane in a young’s double slit experiment. Assume that the intensity due to each slit at any point on the screen is . Point O is equidistant from . The distance between slits is 1mm.
A parallel beam of light is incident at an angle with the normal to the slit plane in a young’s double slit experiment. Assume that the intensity due to each slit at any point on the screen is . Point O is equidistant from . The distance between slits is 1mm.
physics-General
physics-
A long narrow horizontal slit lies 1 mm above a plane mirror. The interference pattern produced by the slit and its image is viewed on a screen 
distant 1m from the slit. The wavelength of light is 600 nm. Then the distance of the first maxima above the mirror is equal to 
A long narrow horizontal slit lies 1 mm above a plane mirror. The interference pattern produced by the slit and its image is viewed on a screen distant 1m from the slit. The wavelength of light is 600 nm. Then the distance of the first maxima above the mirror is equal to
physics-General
physics-
Two parallel beams of light of wavelength 
inclined to each other at angle 
are incident on a plane at near normal incidence. The fringe width will be :
Two parallel beams of light of wavelength inclined to each other at angle are incident on a plane at near normal incidence. The fringe width will be :
physics-General
physics-
M1 and M2 are two plane mirrors which are kept parallel to each other as shown. There is a point 'O' on perpendicular screen just infront of 'S'. What should be the wavelength of light coming from monchromatic source 'S'. So that a maxima is formed at 'O' due to interference of reflected light from both the mirrors. [Consider only 1st reflection]. 
M1 and M2 are two plane mirrors which are kept parallel to each other as shown. There is a point 'O' on perpendicular screen just infront of 'S'. What should be the wavelength of light coming from monchromatic source 'S'. So that a maxima is formed at 'O' due to interference of reflected light from both the mirrors. [Consider only 1st reflection].
physics-General
