Question
State whether the potential is a scalar or vector? What does the positive and negative sign of potential convey?
✓
Answer
Potential is also a scalar quantity. The positive sign of potential conveys that work has to be done on the positive test charge against the repulsive force due to the positive charge in bringing it from infinity. The negative sign of potential conveys that work is done on the negative test charge by the attractive force.
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
State three common properties of beta rays and cathode rays.
What change should be effected in the velocity of a body to maintain the same K.E., if its mass is increased four times?
A cell of e.m.f ε and internal resistance r is used to send current to an external resistance R. write expresssions for (a) the total resistance of circuit, (b) the current drawn from the cell. (c) the p.d
across the cell. And (d) voltage drop inside the cell.
across the cell. And (d) voltage drop inside the cell.
PQ and PR are two light rays emerging from the object as shown in the figure below:
(i) What is the special name given to the angle of incidence (∠PQN) of ray PQ?
(ii) Copy the ray diagram and complete it to show the position of the image of the object P when seen obliquely from above.
(iii) Name the phenomenon that occurs if the angle of incidence ∠PQN is increased still further.
(i) What is the special name given to the angle of incidence (∠PQN) of ray PQ?
(ii) Copy the ray diagram and complete it to show the position of the image of the object P when seen obliquely from above.
(iii) Name the phenomenon that occurs if the angle of incidence ∠PQN is increased still further.
A boy standing in front of a wall at a distance $17 \ m$ produces $10$ claps per second. He notices that the sound of his clapping coincides with the echo. Echo is heard only once when clapping is stopped. Calculate the speed of sound.
→Name a device in which solar energy is converted into electricity state its two uses.
How does the resistance of a wire depend on its radius? Explain your answer.
The focal length of a lens is (i) positive, (ii) negative.
In each case, state the kind of lens.
In each case, state the kind of lens.
In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?
What happens to the mass number of an element when (i) An $\alpha$-particle, (ii) $A \beta$-particle, and (iii) $\gamma$-radiation is emitted?
→