हिंदी

Calculate the Value of the Resistance R in the Circuit Shown in the Figure So that the Current in the Circuit is 0.2 A. What Would B the Potential Difference Between Points a and B?

Advertisements
Advertisements

प्रश्न

Calculate the value of the resistance R in the circuit shown in the figure so that the current in the circuit is 0.2 A. What would b the potential difference between points A and B?

Advertisements

उत्तर

Apply Kirchhoff’s loop law in loop UVWXU:-

5(0.2) + R (0.2) + 10(0.2) = 6 − 2

⇒ R = 5Ω

VAB = VVW 5(0.2) = 1V

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2011-2012 (March) All India Set 2

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

Use Kirchhoff's rules to obtain conditions for the balance condition in a Wheatstone bridge.


Determine the current drawn from a 12 V supply with internal resistance 0.5 Ω by the infinite network shown in the figure. Each resistor has 1 Ω resistance.


The current is drawn from a cell of emf E and internal resistance r connected to the network of resistors each of resistance r as shown in the figure. Obtain the expression for

  1. the current draw from the cell and
  2. the power consumed in the network.


In the given circuit, assuming point A to be at zero potential, use Kirchhoff’s rules to determine the potential at point B.


An infinite ladder is constructed with 1 Ω and 2 Ω resistors, as shown in the figure. (a) Find the effective resistance between the points A and B. (b) Find the current that passes through the 2 Ω resistor nearest to the battery.


Two unequal resistances, R1 and R2, are connected across two identical batteries of emf ε and internal resistance r (see the figure). Can the thermal energies developed in R1 and R2 be equal in a given time? If yes, what will be the condition?


Solve the following question.
Using Kirchhoff’s rules, calculate the current through the 40 Ω and 20 Ω  resistors in the following circuit. 


Twelve wires each having a resistance of 3 Ω are connected to form a cubical network. A battery of 10 V and negligible internal resistance is connected across the diagonally opposite corners of this network. Determine its equivalent resistance and the current along each edge of the cube.


State Kirchhoff’s current rule.


State Kirchhoff ’s voltage rule.


A potentiometer wire has a length of 4 m and resistance of 20 Ω. It is connected in series with resistance of 2980 Ω and a cell of emf 4 V. Calculate the potential along the wire.


In a potentiometer arrangement, a cell of emf 1.25 V gives a balance point at 35 cm length of the wire. If the cell is replaced by another cell and the balance point shifts to 63 cm, what is the emf of the second cell?


The instrument for the accurate measurement of the e.m.f of a cell is ______.


Kirchhoff’s second law is a consequence of law of conservation of ______.


Assertion: Kirchhoff’s junction rule follows from conservation of charge.
Reason: Kirchhoff’s loop rule follows from conservation of momentum.


The Kirchhoff's second law (ΣiR = ΣE), where the symbols have their usual meanings, is based on ______.


While measuring the length of the rod by vernier callipers, the reading on the main scale is 6.4 cm and the eight divisions on vernier is in line with marking on the main scale division. If the least count of callipers is 0.01 and zero error - 0.04 cm, the length of the rod is ______.


What is the advantage of using thick metallic strips to join wires in a potentiometer?


Two cells of voltage 10V and 2V and internal resistances 10Ω and 5Ω respectively, are connected in parallel with the positive end of 10V battery connected to negative pole of 2V battery (Figure). Find the effective voltage and effective resistance of the combination.


State the two Kirchhoff’s rules used in the analysis of electric circuits and explain them.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×