MCQ
If an $\alpha$-particle and a proton are accelerated from rest by a potential difference of 1 megavolt then the ratio of their kinetic energy will be
- A$\frac{1}{2}$
- B$1$
- ✓$2$
- D$4$
✓
Answer
Correct option: C.
$2$
c
(c)
(c)
$\Delta K E=q V$
$\frac{\Delta KE _\alpha}{\Delta KE _p}=\frac{q_\alpha V}{q_p V}=\frac{q_\alpha}{q_p}=2$
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
According to classical theory, path of electron in Rutherford model :
When two identical capacitors are in series have 3mF capacitance and when parallel 12mF. What is the capacitance of each
An electric iron draws $5\, amp$, a $TV$ set draws $3\, amp$ and refrigerator draws $2\, amp$ from a $220\, volt$ main line. The three appliances are connected in parallel. If all the three are operating at the same time, the fuse used may be of ............. $amp$
→Intially, switch $S$ is connected to position $1$ for a long time shown in figure. The net amount of heat generated in the circuit after it is shifted to position $2$ is
→If in a plano-convex lens, radius of curvature of convex surface is $10 \,cm$ and the focal length of lens is $30 \,cm$, the refractive index of the material of the lens will be ..........
→A metal is heated in a furnace where a sensor is kept above the me al surface to read the power radiated $(P)$ by the metal. The sensor has a scale that displays $\log _{\text {: }}\left(P / P_0\right)$, where $P_0$ is a constant. When the metal surface is at a temperature of $487^{\circ} \mathrm{C}$, the sensor shows a value $1$. Assume that the emissivity of the metallic surface remains constant. What is the value displayed by the sensor when the temperature of the metal surface is raised to $2767^{\circ} \mathrm{C}$ ?
→$\sigma$ is the uniform surface charge density of a thin spherical shell of radius $R$. The electric field at any point on the surface of the spherical shell is:
→An ideal gas goes from the state i to the state fas shown in figure. The work done by the gas during the process: 
The capacitor shown in fig. is in steady state. The energy stored in the capacitor is
A particle $A$ has charge $+q$ and particle $B$ has charge $+ 4q$ with each of them having the same mass $m$. When allowed to fall from rest through same electrical potential difference, the ratio of their speed $V_A : V_B$ will be :-
→