MCQ
Which is not true with respect to the cathode rays
- AA stream of electrons
- BCharged particles
- ✓Move with speed same as that of light
- DCan be deflected by magnetic fields
✓
Answer
Correct option: C.
Move with speed same as that of light
c
(c) Speed of the cathode rays is ${10^7}\,m/\sec \, - \,3 \times {10^7}m/s$
(c) Speed of the cathode rays is ${10^7}\,m/\sec \, - \,3 \times {10^7}m/s$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The work function of metal $A$ and $B$ are in the ratio $1 : 2$. If light of frequencies $f$ and $2f$ are incident on the surfaces of$ A$ and $B$ respectively, the ratio of the maximum kinetic energy of photo electrons emitted will be ($f$ and $2f$ both frequency greater than threshold frequency of metal $A$ and $B$)
→Two large parallel plates are connected with the terminal of $100\, V$ power supply. These plates have a fine hole at the centre. An electron having energy $200\, eV$ is so directed that it passes through the holes. When it comes out it's de-Broglie wavelength is ............. $\mathop {\rm{A}}\limits^o $
→An amplitude modulated wave is represented by the expression $v_{m}=5(1+0.6 \cos 6280 t) \sin \left(211 \times 10^{4} t \right)\; volts$. The minimum and maximum amplitudes of the amplitude modulated wave are, respectively
→A particle has initial velocity $10\,\, m/s$. It moves due to constant retarding force along the line of velocity which produces a retardation of $5\,\, m/s^2$. Then
→Two fixed frictionless inclined planes making an angle $30^o $ and $60^o $ with the vertical are shown in the figure. Two blocks $A$ and $B$ are placed on the two planes. What is the relative vertical acceleration of $A$ with respect to $B$?
→A tuning fork of known frequency $256\,Hz$ makes $5$ beats per second with the vibrating string of a piano. The beat frequency decreases to $2$ beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was
→Three identical small electric dipoles are arranged parallel to each other at equal separation a as shown in the figure. Their total interaction energy is $U$. Now one of the end dipole is gradually reversed, how much work is done by the electric forces.
→The only elastic modulus that applies to fluids is
In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes $A, B$ and $ C$ are connected to the pipe. The radii of the tubes $A, B $ and $C$ at the junction are respectively $ 2 cm, 1 cm$ and $2 cm.$ It can be said that the
→In the Kundts tube experiment (shown in fig. $(i)$), the rod is clamped at the end instead of clamping it at the center as shown in fig. $(ii).$ It is known that speed of sound in air is $330\ m/s$, powder piles up at successive distance of $0.6\ m$ and length of rod used is $1\ m$, speed of sound in rod is .... $\frac{m}{s}$
→