Electric Charges and Fields — Physics STD 12 Science — Question

Consider a photon of continuous X-ray and a photon of characteristic X-ray of the same wavelength. Which of the following is/are different for the two photons?

The property which differentiate the two kinds of charges is called as:

The equivalent capacitance in the circuit between A and B will be

(a) 1 μF

(b) 2 μF

(c) 3 μF

(d)

The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by

(a) Planck

(b) J.J. Thomson

(c) Einstein

(d) Millikan

The value of the basic unit of the charge is:

Two slits, 4 mm apart, are illuminated by light of wavelength 6000 Å. What will be the fringe width on a screen placed 2m from the slits

(a) 0.12 mm

(b) 0.3 mm

(c) 3.0 mm

(d) 4.0 mm

Wheatstones’s bridge cannot be used for measurement of very _______ resistances.

The magnetic moment of a magnet of length 10 cm and pole strength 4.0 Am will be

(a)

(b) 1.6

(c) 20

(d) 8.0

What happens to the fringe pattern when the Young’s double slit experiment is performed in water instead or air then fringe width

(a) Shrinks

(b) Disappear

(c) Unchanged

(d) Enlarged