Current electricity -1

Heating Effect in Current Electricity

In current electricity, Ohm.s law is obeyed by all :

Name the instrument used to measure the current in an electric circuit.

Name the instrument used to control current in an electric circuit.

Statement I: Since all the current coming to our house returns to powerhouse ( as current travels in a closed loop), there is no need to pay the electricity bill. Statement II: The electricity bill is paid for the power used , not for the current used.

Which of the following is // are correct about electric current ?

The direction of the flow of current through electric circuit is

If the figure shows a part of an electric circuit, then the current is

A:Current density is a very is a vector quantity . R : Electric current , passing through a given unit area is current density.

The electric current in a circuit is given by i=3t Here, t is in second and I in ampere. The rms current for the period to=0 to t=1 s is