How is the field directed, if sheet is negativity charged.

How is the field directed if the sheet is positively charged

Which of the following substances will Precipitate the negatively charged emulsions ?

A small metal ball of mass m is suspended from a thread of length l between the plates of a large plane capacitor. How will the period of oscillations of such a pendulum change, if a charge + q is placed on the ball and the upper plate is negatively charged?

A positive charge is moving vertically upwards when it enters a magnetic field directed to the earth. What is the direction of force on the charge?

A charged particle is moving away from you. If the direction of the magnetic field is clockwise, what is the charge on the particle?

Using Gauss' law, derive expression for the electric field intensity at any point outside a uniformly charged shell Draw the field lines when the charge density of the shell is negative.

Choose the correct alternative. In gel electrophoresis, negatively/positively charged DNA fragments placed over cathode will move towards an electrical field.

When a body becomes negatively charged. Its mass.

A rectangular, a square, a circular and an elliptical loop, all in the x-y plane, are moving out of a uniform magnetic field with a constant velocity Vvec = v_(0)hati . The magnetic field is directed along the negative z-axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for

Frictional electricity The electricity developed in bodies when they are rubbed with each other is called frictional electricity. There are two kinds of charges, namely positive and negative. Like charges repel each other and unlike charges attract each other. when a glass rod is rubbed with silk cloth, glass rod becomes positively charged are silk acquires the same amount of negative charge. the concept of positive and negatice charges was introduced by Benjamin Franklin. The charge is always quantised and conserved in a system. A body can be negatively charged by