मराठी

How Does the Resistance of a Metallic Wire Depend on the Length of Wire? - Physics

Advertisements
Advertisements

प्रश्न

How does the resistance of a metallic wire depend on the length of wire?

एका वाक्यात उत्तर

उत्तर

The resistance of a wire increases with increases in the length of wire (R ∝ l).

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Electricity - Short Answers

APPEARS IN

आईसीएसई Physics [English] Class 10
पाठ 7 Electricity
Short Answers | Q 20.1

संबंधित प्रश्‍न

In the diagram shown below, the cell and the ammeter both have negligible resistance. The resistor are identical.


A wire of resistance R1 is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R2, then the ratio `R_1/R_2` is: 

(a) `1/25`

(b)1/5

(c)5

(c)25


How will you connect three resistors of 2 Ω, 3 Ω and 5 Ω respectively so as to obtain a resultant of 2.5 Ω? Draw the diagram to show the arrangement.


Two exactly similar electric lamps are arranged (i) in parallel, and (ii) in series. If the parallel and series combination of lamps are connected to 220 V supply line one by one, what will be the ratio of electric power consumed by them?  

 


In parallel combination of resistances ______.


A particular resistance wire has a resistance of 3 ohm per meter. Find the total resistance of three lengths of this wire each 1.5 m long, joined in parallel.


A particular resistance wire has a resistance of 3 ohm per meter. Find the potential difference of the battery which gives a current of 2 A in each of the 1.5 m length when connected in the parallel to the battery (assume that resistance of the battery is negligible).


State the S.I. unit of electrical resistance and define it.


A coil in the heater consumes power P on passing current. If it is cut into halves and joined in parallel, it will consume power:


Two resistors of resistances 2 Ω and 3 Ω are connected in parallel to a cell to draw current 0.5 A from the cell. Draw a labelled diagram of the arrangement


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×