हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Given the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of 6 Ω?

Advertisements
Advertisements

प्रश्न

Given the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of 6 Ω?

संख्यात्मक
Advertisements

उत्तर

Equivalent resistance, R’ = 6 Ω

Consider the series combination of the resistors, as shown in the given circuit.

Equivalent resistance of the circuit is given by the sum,

R’ = 1 + 2 + 3 = 6 Ω

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Current Electricity - Exercise [पृष्ठ १२९]

APPEARS IN

एनसीईआरटी Physics Part I and II [English] Class 12
अध्याय 3 Current Electricity
Exercise | Q 3.20 (b) (iii) | पृष्ठ १२९

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

Kirchhoff's junction law is equivalent to .............................
(a) conservation of energy.
(b) conservation of charge
(c) conservation of electric potential
(d) conservation of electric flux


Given n resistors each of resistance R, how will you combine them to get the (i) maximum (ii) minimum effective resistance? What is the ratio of the maximum to minimum resistance?


ε1 and ε2 are two batteries having emf of 34V and 10V respectively and internal resistance of 1Ω and 2Ω respectively. They are connected as shown in the figure below. Using Kirchhoff’s Laws of electrical networks, calculate the currents I1 and I2.


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


Consider the circuit shown in the figure. Find (a) the current in the circuit (b) the potential drop across the 5 Ω resistor (c) the potential drop across the 10 Ω resistor (d) Answer the parts (a), (b) and (c) with reference to the figure.


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?


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 voltage rule.


Obtain the condition for bridge balance in Wheatstone’s bridge.


How the emf of two cells are compared using potentiometer?


Lightning is a very good example of a natural current. In typical lightning, there is 109 J energy transfer across the potential difference of 5 × 107 V during a time interval of 0.2 s. Using this information, estimate the following quantities:

  1. the total amount of charge transferred between cloud and ground
  2. the current in the lightning bolt
  3. the power delivered in 0.2 s.


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?


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


Kirchoff’s first law, i.e., S i = 0 at a junction, deals with the conservation of ______.

The figure below shows current in a part of electric circuit. The current I is ______.


Kirchhoff s second law is based on the law of conservation of ______


Three resistors having resistances r1, r2 and r3 are connected as shown in the given circuit. The ratio `i_3/i_1` of currents in terms of resistances used in the circuit is:


What are the advantages of the null-point method in a Wheatstone bridge? What additional measurements would be required to calculate `R_(unknown)` by any other method?


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


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


Derive the equation of the balanced state in a Wheatstone bridge using Kirchhoff’s laws.


The value of current in the 6Ω resistance is ______.

 


In the circuit shown in Figure below, E1 and E2 are batteries having emfs of 25V and 26V. They have an internal resistance of 1 Ω and 5 Ω respectively. Applying Kirchhoff’s laws of electrical networks, calculate the currents I1 and I2.


The figure below shows two batteries, E1 and E2, having emfs of 18V and 10V and internal resistances of 1 Ω and 2 Ω, respectively. W1, W2 and W3 are uniform metallic wires AC, FD and BE having resistances of 8 Ω, 6 Ω and 10 Ω respectively. B and E are midpoints of the wires W1 and W2. Using Kirchhoff's laws of electrical circuits, calculate the current flowing in the wire W3:


Which two basic physical principles form the basis of Kirchhoff's laws?


What is Kirchhoff's Current Law also called?


What is Kirchhoff's Voltage Law also called?


What is a junction or node?


What is emf?


Which sign convention is usually used for current entering a junction?


While moving in the direction of current through a resistor, how is the potential change treated?


While moving opposite to the direction of current through a resistor, how is the potential change treated?


What is the sign of the emf when moving from the negative terminal to the positive terminal of a cell?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×