Download App

Electrostatics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectrostatics1 Mark
MCQ
A small sphere carrying a charge $'q\ '$ is hanging in between two parallel plates by a string of length $L$. Time period of pendulum is $T_0$. When parallel plates are charged, the time period changes to $T$. The ratio $T / T_0$ is equal to
  • A
    $\left(\frac{g+\frac{q E}{m}}{g}\right)$
  • B
    $\left(\frac{g}{g+\frac{q E}{m}}\right)$
  • ✓
    $\left(\frac{g}{g+\frac{q E}{m}}\right)$
  • D
    None of these
✓

Answer

Correct option: C.
$\left(\frac{g}{g+\frac{q E}{m}}\right)$
$\left(\frac{g}{g+\frac{q E}{m}}\right)$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electrostatics→Electrostatics — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

The terminal potential difference of a cell when short-circuited is (E = E.M.F. of the cell)(a) E (b) E/2 (c) Zero  (d) E/3
       
→
Which of the following statements is false?
→
In summer, a mild wind is often found on the shore of a calm river. This is caused due to,
  1. Difference in thermal conductivity of water and soil.
  2. Convection currents.
  3. Conduction between air and the soil.
  4. Radiation from the soil.
→
Which of the following shows hysteresis ?
→
The frequency response curve of $RC$ coupled amplifier is shown in figure. The band width of the amplifier will be
→
The value of the horizontal component of the earth's magnetic field and angle of dip are $1.8 \times 10^{-5}$ Weber $/ m ^2$  and $30^\circ$ respectively at some place. The total intensity of earth's magnetic field at that place will be
→
Which of the following statement is true about magnetic moments of atoms of different elements(a) All have a magnetic moment(b) None has a magnetic moment(c) All acquire a magnetic moment under external magnetic field and in same direction as the field(d) None of the above statements are accurate
 
 
 
 
→
Two cells when connected in series are balanced on 8m on a potentiometer. If the cells are connected with polarities of one of the cell is reversed, they balance on 2m. The ratio of e.m.f.'s of the two cells is(a) 3 : 5(b) 5 : 3(c) 3 : 4(d) 4 : 3
       
→
The resistance of a galvanometer is $50 \Omega$ and the current required to give full scale deflection is $100 \mu A$. In order to convert it into an ammeter for reading up to $10 A ,$ it is necessary to put a resistance of
→
The focal length of the field lens (which is an achromatic combination of two lenses) of telescope is 90 cm. The dispersive powers of the two lenses in the combination are 0.024 and 0.036. The focal lengths of two lenses are(a) 30 cm and 60 cm(b) 30 cm and – 45 cm(c) 45 cm and 90 cm  (d) 15 cm and 45 cm
   
   
→