Safe level of noise depends on factors:

Sound waves having frequency higher than 20,000 Hz are called:

SI unit of electric potential is:

A positive electric charge:

If we double the distance between two charges, then force becomes

An object gains excess negative charge after being rubbed against another object, which is:

The technique or method used to absorb undesirable sounds by soft and porous surface is called:

Sound waves having frequency lower than 20 Hz are called:

Coulomb’s law is mathematically stated as:

At room temperature, electrons cannot escape the metal surface due to ………….. of atomic nucleus:

NOT gate is also called:

The 1st practical electric battery is known as:

Study of charges at rest is called __________

An insulating rod is charged positively ·by rubbing. This is due to

When an insulating rod is charged negatively, this is due to

If we run a plastic comb through hair and then _bring it near shell pieces of paper. The comb____________

Electric charges ca_n be produced by rubbing a neutral body with

SI unit of electric charge is_______________

A positive charge

A region around the charge in which it exerts electrostatic force on another charge is called

The spacing between the field lines shows the

The space around the charge within which other charges are influenced by it is called

Force experienced by a unit positive charge placed at a point in the electric field is known as

Work done in bringing a unit positive charge from infinity to that point in an· electric field is called

When capacitors are connected in parallel, their equivalent capacitance is equal to