Question

which quality of resistance that remains same when connected in series

Answer 1

it is the absolute 6

Answer 2

(1) Physical quantity remains same is electric current, resistance and potential drop across the bulbs, luminosity (2) None

 

Explanation

 

Since they have same wattage and same voltage rating so, they will have same resistance.  Same resistance implies same potential drop across the bulbs.

 

 b. (1) Physical quantity remains same is electric current, resistance and potential drop across the bulbs, luminosity (2) None

 

Explanation

 As in above case resistance are same in parallel connection the potential difference is also same so same amount of current will flow across each bulb.

 

 c. (1) Physical quantity remains same is electric current (2)  That are different potential drop, Resistance, luminosity.

 

Explanation

If wattage is different with same voltage rating then the resistance are different too. This makes pd across the resistors different in series connection.

 

 d. (1) Physical quantity remains same is pd (2)  Electric current, resistance, luminosity.

 

Explanation

If wattage is different with same voltage rating then the resistance are different too. This makes each of them draw different current in a parallel combination.