हिंदी

How Will You Connect Three Resistors of Resistances 2 ω, 3 ω, and 6 ω to Obtain a Total Resistance of 4 ω, and 1 ω?

Advertisements
Advertisements

प्रश्न

How will you connect three resistors of resistances 2 Ω, 3 Ω, and 6 Ω to obtain a total resistance of  4 Ω, and  1 Ω?

Advertisements

उत्तर

To obtain a 4 Ω resistance, connect the 2 Ω resistor in series with the parallel combination of the resistors of values 6 Ω and 3 Ω.
To obtain a 1 Ω resistance, connect all the resistors in parallel. 

 

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Electricity - Exercise 5 [पृष्ठ २३३]

APPEARS IN

लखमीर सिंग Physics Part 1 [English] Class 10
अध्याय 4 Electricity
Exercise 5 | Q 48. | पृष्ठ २३३

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of 9 Ω.


A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistances, which may be used separately, in series, or in parallel. What are the currents in the three cases?


The equivalent resistance of the parallel combination of two resistors of 60Ω and 40Ω is _______.

A) 24Ω

(B) 100Ω

(C) 50 Ω

(D) 240Ω


Find the current in each resistor in the circuit shown below: 


An electric heater which is connected to a 220 V supply line has two resistance coils A and B of 24 Ω resistance each. These coils can be used separately (one at a time), in series or in parallel. Calculate the current drawn when:

(a) only one coil A is used.
(b) coils A and B are used in series.
(c) coils A and B are uses in parallel.


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

With the switch K open, the ammeter reads 0.6 A. What will be the ammeter reading when the switch is closed?


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


State how are the two resistors joined with a battery when equivalent resistance is less than either of the two resistances.


In the following figure calculate:

  1. the total resistance of the circuit
  2. the value of R, and
  3. the current flowing in R.


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.


The circuit diagram Fig shows three resistors 2 Ω, 4 Ω and R Ω connected to a battery of e.m.f. 2 V and internal resistance 3 Ω. If main current of 0.25 A flows through the circuit, find:

  1. the p.d. across the 4 Ω resistor,
  2. the p.d. across the internal resistance of the cell,
  3. the p.d. across the R Ω or 2 Ω resistors
  4. the value of R.

Two resistors of resistance 4 Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.

Draw a labeled diagram of the arrangement


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).


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


In the figure below, the ammeter A reads 0.3 A. Calculate:
(i) the total resistance of the circuit
(ii) the value of R
(iii) the current flowing through R.


A piece of wire having a resistance R is cut into five equal parts.

  1. How will the resistance of each part of the wire change compared with the original resistance?
  2. If the five parts of the wire are placed in parallel, how will the resistance of the combination change?
  3. What will be ratio of the effective resistance in series connection to that of the parallel connection?

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:


Assertion: When a battery is short circuited, the terminal voltage is zero.

Reason: In a short circuit, the current is zero.


A piece of wire of resistance R is cut into three equal parts. These parts are then connected in parallel. If the equivalent resistance of this parallel combination is R1, what is the value of the ratio R1 : R?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×