MCQ
Cathode rays are group of :
- ✓electrons
- Bprotons
- Cneutrons
- Datoms
✓
Answer
Correct option: A.
electrons
A
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
$36$ cells, each of emf $4V$ are connected in series and kept in a box. The combination shows an emf of $88V$ on the outside. Calculate the number of cells reversed.
→The field normal to the plane of a wire of $n$ turns and radius $r$ which carries a current $i$ is measured on the axis of the coil at a small distance $h$ from the centre of the coil. This is smaller than the field at the centre by the fraction
→The graph between wave number $(\overline{\mathrm{v}})$ and angular frequency $(\omega)$ is
→A real image is formed by:
Figure shows a standard two slit arrangement with slits $S_1, S_2. P_1, P_2$ are the two minima points on either side of $P \ ($Fig$)$. At $P_2$ on the screen, there is a hole and behind $P_2$ is a second $2- $ slit arrangement with slits $S_3, S_4$ and a second screen behind them.
→In a RLC circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to.
The simple Bohr modle is not applicable to $He^4$ atom because$:$
→An arrangement which consists of two conductors separated by a dielectric medium is called:
A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will(a) Decrease and change sign(b) Increase and change sign(c) Decrease and remain of the same sign(d) Increase and remain of the same sign
It is easier to start a car engine on a hot day than on a cold day. This is because the internal resistance of the car battery(a) Decreases with rise in temperature(b) Increases with rise in temperature(c) Decreases with a fall in temperature(d) Does not change with a change in temperature