electric currects and its effects

what are the components of electric circuit

• wire and led

• wire, led and switch

• battery,wire, switch and led

• wire,battery,copper wire and switch

how many cells make up a battery

• 1 cell

• 2 or more cells

• only 2 cells

• 4 cells

• 5 cells

in parallel batteries which should be connected

• + and +

• - and -

• + and -

• anyways

applainces which produce heat effect

• laptop, computer and mobile phone only

• all light emiting devices only

• all electric devices

• only room heaters, iron box and electric stove

which of them is not a component in circuit

• 
• 
• 
• 

what is the full form of MCB

• mini circuit breaker

• master circuit breaker

• mini current breaker

• master current breaker

how can the battery be connected in series connection ( 2 or more ways)

• + and +

• - and -

• + and -

• - and +

why is tungsen exslusively for electric bulb

• it has high melting point

• it is the only metal that conducts electricity for bulb

• it can't be broken easily

• it can be broken easily

how many times a fuse can be used

• only 1 time

• only 2 times

• infinite times

• only 5 times

what does fuse do when more current passes

• it lets the current to the electrical device

• it breaks the circuit

• it gives less amount of current supply to the electrical device

• it does not do anything