Electricity Class 10

The potential at a point is 20V. The work- done in bringing a charge of 0.5 C from infinity to this point will be

• 20 J

• 10 J

• 5 J

• 40J

A charge is taken from point A to B . The work done per unit charge in this process is called

• the potential at A

• the potential at B

• the potential difference between B and A

• the current from A to B

Joule/coulomb is same as

• watt

• volt

• ampere

• ohm

Voltmetre is used to measure

• potential difference

• electric current

• electric power

• resistance

In metals

• all the electrons are bound to their parent atom

• all electrons are free to move

• there are no electrons

• some electrons are free to move

The current in wire depends

• only on the potential difference applied

• only on the resistance of the wire

• on both of them

• none of them

Consider the following incomplete statement " Ohms law relates potential diffrence with ........... for a given resistance" The suitable choice for missing word is

• Power

• Energy

• Current

• Time

Resistance of a cylindrical piece of rubber is ______ then that a similar piece of copper

The Kilowatt hour is the unit of _____

The equivalent resistance of two equal resistance in parallel is ____ the values of each resistance