Semiconductor Electronics : Materials Devices and Simple Circuits — Physics STD 12 Science — Question

If a glass prism is dipped in water, its dispersive power:

Which of the following shows green house effect(a) Ultraviolet rays(b) Infrared rays(c) X-rays   (d) None of these

There is 10 units of charge at the centre of a circle of radius 10m. The work done in moving 1 unit of charge around the circle once is (a) Zero  (b) 10 units(c) 100 units(d) 1 unit

Assertion  :  In Young’s experiment, the fringe width for dark fringes is different from that for white fringes.
Reason      : In Young’s double slit experiment the fringes are performed with a source of white light, then only black and bright fringes are observed.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.

The most important features of superconductor is that:

Mark the correct options:

In reverse biasing:

Microwaves are electromagnetic waves with frequency in the range of:

A uniform electric field pointing in positive X-direction exists in a region. Let A be the origin, B be the point on the X-axis at x = +1 cm and C be the point on the Y-axis at y 1 cm. Then the potential at points A, B and C satisfy