MCQ
If a body is charged by rubbing it. Its weight
  • A
    always decreases slightly
  • B
    always increases slightly
  • may increase slightly or may decrease slightly
  • D
    remains precisely the same

Answer

Correct option: C.
may increase slightly or may decrease slightly
c
Weight may increase or decrease depending uopn whether the body is charged negatively or positively.

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

Similar questions

Choke coil works on the principle of
A capacitor is a system of two conductors separated by $......$
The focal length of the obejctive lens and the eye piece of a microscope are $2\, cm$ and $5\, cm$ respectively and the distance between them is $20\, cm$. Find the distance of  the object from objective lens when final image is seen by the eye is $25 \,cm$ from the  eye piece......$cm$
A hydrogen like atom of atomic number Z is in an excited state of quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a transition to quantum state n, a photon of energy 40.8 eV is emitted. The value of n will be
A photoelectric surface is illuminated successively by monochromatic light of wavelength $\lambda$ and $\lambda /2$. If the maximum kinetic energy of the emitted photoelectrons in the second case is $3$ times that in the first case, the work function of the surface of the material is 
$(h =$ Planck's constant, $c =$ speed of light $)$ 
When the current in a coil changes from $8$ $ampere$ to $2$ $ampere$ in $3 \times {10^{ - 2}}$ $second,$ the $e.m.f$ induced in the coil is $2\;volt$. The self inductance of the coil (in $millihenry$) is  
The distance between object and its two times magnified real image as produced by a convex lens is $45 \mathrm{~cm}$. The focal length of the lens used is___________ $\mathrm{cm}$.
$A$ ray of light is incident normally on a prism of refractive index $1.5$, as shown. The prism is immersed in a liquid of refractive index $'\mu '$. The largest value of the angle $ACB$, so that the ray is totally reflected at the face $AC$, is $30^o$. Then the value of $\mu$ must be :
A straight wire of length ($\pi^2$) metre is carrying a current of 2A and the magnetic field due to it is measured at a point distant 1 cm from it. If the wire is to be bent into a circle and is to carry the same current as before, the ratio of the magnetic field at its centre to that obtained in the first case would be
In diode, when there is saturation current, the plate resistance $({r_p})$ is