There is a point charge q located at the center of a cube. What is the electric flux of this point charge, through a face of the cube?
(A)q/ε₀
(B) q/6ε₀
(C) q/3ε₀
(D)It will depend upon the size of the cube
(A)q/ε₀
(B) q/6ε₀
(C) q/3ε₀
(D)It will depend upon the size of the cube
(B) q/6ε₀
A charge q is placed at one corner of the cube. The electric flux passing through any one of its face is
The given figure shows tracks of three charged particles in a uniform electrostatic field. Which of them is probably an α-particle?
(A) 1
(B) 2
(C) 3
(D) None of the above
Figure shows a point charge + Q, located at a distance R/2 from the centre of a spherical metal shell. Draw the electric field lines for the given system.
What is the angle between the electric dipole moment and electric field strength due to it on the axial line?
(A) \(0^\circ\)
(B) \(90^\circ\)
(C) \(180^\circ\)
(D) None of these
Two-point charges 2μC and 4μC are placed 2 cm apart. The ratio of the Coulomb’s force experienced by them is
(A) 1: 2
(B) 2: 1
(C) 1: 1
(D) 4: 1
what is the angle between an electric dipole moment and then electric field strength due to it on its equatorial line?
(A) \(0^\circ\)
(B) \(90^\circ\)
(C) \(180^\circ\)
(D) None of these
the magnitude of a charge q at the center of two equal and like charges Q so that the three charges are in equilibrium
A. Q
B. Q/2
C. Q/4
D. –Q/4
In a double slit interference pattern, the first maxima for infrared light would be
(a) at the same place as the first maxima for green light
(b) closer to the centre than the first maxima for green light
(c) farther from the centre than the first maxima for green light
(d) infrared light does not produce an interference pattern
A Young’s double – slit set up for interference is shifted from air to within water. Then the
(A) Fringe pattern disappear
(B) fringe width decreases
(C) fringe width increases
(D) fringe width remains unchanged
The interference phenomenon takes place
I. In all waves
II. In transverse waves only
III. In longitudinal waves only
IV. In standing waves only
The V-i graph for a conductor at temperature T¹ and T² are as shown in the figure. (T² - T¹) is proportional to
(a) cos θ
(b) sin θ
(c) cot 2θ
(d) tan θ
A hollow copper sphere is positively charged. The electric field at its center will be
A. same as that on the surface
B. more than that on the surface
C. less than that on the surface nut not zero
D. zero
What happens to the interference pattern, the two slits S1 and S2 in Young’s double slit experiment are illuminated by two independent but identical sources?
a. The intensity of the bright fringes doubled
b. The intensity of the bright fringes becomes four times
c. Two sets of interference fringes overlap
d. No interference pattern is observed.
The main condition for diffraction to be observed is
a. Size of obstacle should be much smaller than the wavelength of the wave.
b. Size of obstacle should be much larger than the wavelength of the wave.
c. Size of the obstacle should be comparable to the wavelength of the wave.
d. For any size of the obstacle.