Which of the following is an example of a couple?
A positively charged particle is placed near a negatively charged particle. What is the direction of the electric force between the two particles?
When a water droplet is placed on a freshly cut piece of wood, it spreads out to form a thin layer because the wood is
Which of the following statements is correct about the angle of dip at various points on Earth?
In the diagram above, if the south poles of two magnets stroke a steel bar, the polarities at X and Y will respectively be
