Question

Give some hard questions on electricity (class 10) (only numericals)​

Answer 1

Answer:

here is ur answer

Explanation:

1) Name the unit of (a) electrical resistance (b) resistivity

2) Define one ohm

3) Define resistivity

4) Determine the direction of conventional current

5) what is electrical power ? Name its unit.

6) You make two resisters of resistance 2R and 3R and connect them in parallel in a electric circuit Calculate the ratio of the electrical power consumed by 2R and 3R ?

7) A small bulb has a resistance of 2Q when cold it takes up a current of 0.4 A from a source of 4V and then starts glowing . calculate (i) the resistance of the bulb when it is glowing (ii) elaborate on the reason for the difference in resistance .

8) Define resistance and resistivity and also give the reason between them . Explain the dependence of resistance on temperature.

9) A bulb rated at 330V- 110W . What do you think is it's resistance ? Three such bulbs burns of 5hrs at a stretch . what is the energy consumed Calculate the cost of rupees if the rate is 70 paise per unit .

10) What connection is used in domestic appliances and why ?

Hope it help

Answer 2

Answer:

here ur answer

Explanation:

1) why are metals good conducter of electricity whereas glass is a bad conductor of electricity ? Give reason ?

2) write joules law of heating

3) why is tungsten used for filament

4) find the resistance if all of these parts are connected in :

a) parallel

b) series ?

5) why is lead tin alloys used for fuse wires ?

6) state ohm's law ?with diagram and graph ?

7) what is electrical resistivity ?derive SI unit ?

THANK You