Explain : "Electric charges are additive in nature." - Vidyadip

Question

Explain : "Electric charges are additive in nature."

✓

Answer

→ If a system contains two point charges $q_1$ and $q_2$, the total charge of the system is obtained simply by adding them algebraically. i.e., total charge of the system is $q_1+q_2$.
→ If a system contains n charges $q_1, q_2, q_3, \ldots, q_n$, then the total charge of the system is $q_1+q_2+$ $q_3+\ldots+q_n$
→ Charge has magnitude but no direction, similar to mass. However, there is one difference between mass and charge. Mass of a body is always positive whereas a charge can be either positive or negative. Proper signs have to be used while adding the charges in a system.
→ For example, the total charge of a system containing five charges $+1,+2,-3,+4$ and -5 , in some arbitrary unit, is $(+1)+(+2)+(-3)+$ $(+4)+(-5)=-1$.
→ Thus, the total electric charge of any system is equal to the algebraic sum of the positive and negative electric charge at different points within the system.

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 "2 Marks Questions" from Electric Charges and Fields→Electric Charges and Fields — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Answer the following questions:
An applied voltage signal consists of a superposition of a dc voltage and an ac voltage of high frequency. The circuit consists of an inductor and a capacitor in series. Show that the dc signal will appear across C and the ac signal across L.

Whether the diffraction effects from a slit will be more clearly visible or less clearly, if the slit-width is increased?

A positive charge q is placed in front of a conducting solid cube at a distance d from its centre. Find the electric field at the centre of the cube due to the charges appearing on its surface.

Draw a plot of the binding energy per nucleon as a function of mass number for a large number of nuclei, 2⩽ A⩽240. How do you explain the constancy of binding energy per nucleon in the range 30 < A < 170 using the property that nuclear force is short - ranged?

A point charge Q is placed at the origin. Find the electrostatic energy stored outside the sphere of radius R centred at the origin.

Two trains are travelling towards each other both at a speed of $90\ km/h.$ If one of the trains sounds a whistle at $500\ Hz,$ what will be the apparent frequency heard in the other train? Speed of sound in air $= 350\ m/s.$

The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is $0.4\ \Omega,$ what is the maximum current that can be drawn from the battery?

Electrons are emitted from the surface when green light is incident on it, but no electrons are ejected when yellow light is incident on it. Do you expect electrons to be ejected when surface is exposed to (i) Red light and (ii) Blue light?

A particle executes simple harmonic motion. If you are told that its velocity at this instant is zero, can you say what is its displacement? If you are told that its velocity at this instant is maximum, can you say what is its displacement?

A proton and an alpha particle are accelerated through the same potential. Which one of the two has, (i) greater value of de-Broglie wavelength associated with it and (ii) less kinetic energy. Give reasons to justify your answer.