The dimensional representation of \(ε_0\) will be
A. [\(MLT^2\)\(A^2\)]
B. [\(M^{-1}\) \(L^{-3}\) \(T^4\) \(A^2\)]
C. [\(ML^{-2}\)\(T^2\) \(A^{-2}\)]
D. none of these
A. [\(MLT^2\)\(A^2\)]
B. [\(M^{-1}\) \(L^{-3}\) \(T^4\) \(A^2\)]
C. [\(ML^{-2}\)\(T^2\) \(A^{-2}\)]
D. none of these
B. [\(M^{-1}\) \(L^{-3}\) \(T^4\) \(A^2\)]
\(10^6\) electrons are taken out of a pith ball. The positive charges on the pith ball is
A. 1.6x \(10^{-13}\) C
B. 1.6x \(10^{-19}\) C
C. 1.6x \(10^{-25}\) C
D. none of these
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
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 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
Electric charge between two bodies can be produced by
(A )Sticking
(B) Rubbing
(C) Oiling
(D) Passing AC current
In the process of charging, the mass of the negatively charged body-
(A) Increases
(B) Decreases
(C) Remains Constant
(D) None of the above
Derive an expression for electric field of a dipole at a point on the equatorial plane of the dipole. How does the field vary at large distances?
In a purely resistive a.c. circuit, the current
(a) is in phase with the e.m.f.
(b) leads the e.m.f. by a difference of π radians phase
(c) leads the e.m.f. by a phase difference of π/2 radians
(d) lags behind the e.m.f. by a phase difference of π/4 radians
Wavefront generated from a line source is
a. Cylindrical wavefront
b. Spherical wavefront
c. Plane front
d. Either a.) or b.)
In Young’s double slit experiment, the fringe width is found to be 0.4 mm. If the whole apparatus is immersed in water of refractive index 4/3 without disturbing the geometrical arrangement, the new fringe width will be :
i. 0.3 mm
ii. 0.4 mm
iii. 0.53 mm
iv. 0.75 mm
In Young’s double slit experiment, the two slits are separated by 1 mm and the screen is placed at 1 m away. It produces the second dark fringe at At a distance of 2mm from the central fringe, the wavelength of monochromatic light used would be
(A) 1.3 x \(10^{-6}\) m
(B) 2 x \(10^{-6}\) cm
(C) 2 x \(10^{-9}\) m
(D) 1.3 x \(10^{-6}\) cm
In a region of constant potential,
(a) the electric field is uniform
(b) the electric field is zero
(c) there can be no charge inside the region
(d) the electric field shall necessarily change, if a charge is placed outside the region
Three capacitors 3 μF, 6 μF and 6 μF are connected in series to a source of 120 volt. The potential difference across the 3 μF capacitor will be
(a) 40 volt
(b) 30 volt
(c) 40 volt
(d) 60 volt
A 40 mF capacitor is connected to a 200 V, 50 Hz ac supply. The r.m.s value of the current in the circuit is, nearly
(a) 1.7 A
(b) 2.05 A
(c) 2.5 A
(d) 25.1 A