- ACathode rays can produce x-rays
- BThe properties of cathode rays differ from the properties of x-rays
- CThe cathode rays possess too much kinetic energy
- DCathode rays are not deflected by electric and magnetic field
Explanation:
Properties of cathode rays:
They are produced by the negative electrode, or cathode, in an evacuated tube, and travel towards the anode.
They travel in straight lines and cast sharp shadows.
They have energy and can do work.
They are deflected by electric and magnetic fields and have a negative charge.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In the following Wheatstone bridge P/Q = R/S. If key K is closed, then the galvanometer will show deflection
|
(a) In left side |
(b) In right side |
(c) No deflection |
(d) In either side |
When NPN transistor is used as an amplifier
|
(a) Electrons move from base to collector |
|
(b) Holes move from emitter to base |
|
(c) Electrons move from collector to base |
|
(d) Holes move from base to emitter |
The nature of binding for a crystal with alternate and evenly spaced positive and negative ions is
|
(a) Covalent |
(b) Metallic |
(c) Dipolar |
(d) Ionic |
Two positive charges of 20 coulomb and Q coulomb are situated at a distance of 60 cm. The neutral point between them is at a distance of 20 cm from the 20 coulomb charge. Charge Q is
|
(a) 30 C |
(b) 40 C |
(c) 60 C |
(d) 80 C |