If two conducting spheres are separately charged and then brought in contact:

Consider the following statements:

I. The resistance of ideal voltmeter is infinite.

II. The resistance of ideal ammeter is zero.

III. Tangent galvanometer is used to measure steady currents.

IV. Law of electrolysis is given by Faraday.

Which of the statements given above are correct?

If the resistance of a home appliance is increased, then:

I. Its power will be decreased

II. It can do a work fastly

III. Voltage will be increased

Which of the statement(s) is/are true?

Two conducting wires $A$ and $B$ are made of same material. If the length of $B$ is twice that of $A$ and the radius of circular cross-section of $A$ is twice that of $B$, then their resistances $R_{\mathrm{A}}$ and $R_{\mathrm{B}}$ are in the ratio,

Consider the following statements. Household electrical appliances are not usually connected in series, because:

I. Switching off an appliance would switch off the rest.

II. A fuse would blow as soon as one of appliance is used.

III. Power consumption would be very much greater.

IV. The appliances would get damage due to high current.

Which of the above statements are correct?