Advertisements
Advertisements
प्रश्न
Kirchhoff’s junction rule is a reflection of ______.
- conservation of current density vector.
- conservation of charge.
- the fact that the momentum with which a charged particle approaches a junction is unchanged (as a vector) as the charged particle leaves the junction.
- the fact that there is no accumulation of charges at a junction.
विकल्प
b and c
a and c
b and d
c and d
Advertisements
उत्तर
b and d
Explanation:
Junction rule: At any junction, the sum of the currents entering the junction is equal to the sum of currents leaving the junction.
Or
Algebraic sum of the currents flowing towards any point in an electric network is zero, i.e., charges are conserved in an electric network.
The proof of this rule follows from the fact that when currents are steady, there is no accumulation of charges at any junction or at any point in a line. Thus, the total current flowing in, (which is the rate at which charge flows into the junction), must equal the total current flowing out.
Kirchhoff's junction rule is also known as Kirchhoff’s current law.
So, Kirchhoff's junction rule is the reflection of conservation of charge
Important point: Sign convention of current from a junction: We are taking outgoing current from a junction as negative. And we are taking incoming current towards a junction as positive.
APPEARS IN
संबंधित प्रश्न
Determine the current in each branch of the network shown in figure.
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.
Given the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of 6 Ω?
State Kirchhoff's rules for an electric network. Using Kirchhoff's rules, obtain the balance condition in terms of the resistances of four arms of Wheatstone bridge.
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?
Consider the following two statements:-
(A) Kirchhoff's junction law follows from conservation of charge.
(B) Kirchhoff's loop law follows from conservative nature of electric field.
Find the equivalent resistances of the networks shown in the figure between the points a and b.
Consider the potentiometer circuit as arranged in the figure. The potentiometer wire is 600 cm long. (a) At what distance from the point A should the jockey touch the wire to get zero deflection in the galvanometer? (b) If the jockey touches the wire at a distance of 560 cm from A, what will be the current in the galvanometer?
A capacitor of capacitance 8.0 μF is connected to a battery of emf 6.0 V through a resistance of 24 Ω. Find the current in the circuit (a) just after the connections are made and (b) one time constant after the connections are made.
On which conservation principle is Kirchoff's Second Law of electrical networks based?
Solve the following question.
Using Kirchhoff’s rules, calculate the current through the 40 Ω and 20 Ω resistors in the following circuit.
State Kirchhoff’s current rule.
Obtain the condition for bridge balance in Wheatstone’s bridge.
Kirchhoff’s second law is a consequence of law of conservation of ______.
Two cell of 1.25 V and 0.75 V are connected parallel. The effective voltage will be:-
The e.m.f of The battery in a thermocouple is doubled. The rate of heat generated at one of the junction will.
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 is the advantage of using thick metallic strips to join wires in a potentiometer?
Power P is to be delivered to a device via transmission cables having resistance RC. If V is the voltage across R and I the current through it, find the power wasted and how can it be reduced.
State the two Kirchhoff’s rules used in the analysis of electric circuits and explain them.
A 6-volt battery is connected to the terminals of a three-metre-long wire of uniform thickness and resistance of 100 ohms. The difference of potential between two points on the wire separated by a distance of 50 cm will be ______.
At any junction, what does Kirchhoff's Current Law state?
What is Kirchhoff's Voltage Law also called?
Which pair of equations expresses the loop relationship for cells and resistors?
What is a junction or node?
Which term is defined as the rate of flow of charge through a conductor?
What is emf?
Why must the amount of charge entering a junction per second equal the amount leaving when current is steady?
If currents \[I_1\] and \[I_2\] enter a junction and currents \[I_3\] and \[I_4\] leave it, which equation follows from Kirchhoff's First Law?
In a closed loop containing cells and resistors, what equals the total potential drop across the resistors?
Which sign convention is usually used for current entering a junction?
Which sign convention is usually used for current leaving a junction?
While moving in 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?
At junction P, currents \[0.2\,\mathrm{A}\], \[0.6\,\mathrm{A}\], and \[0.7\,\mathrm{A}\] point towards P, while \[0.4\,\mathrm{A}\], \[0.5\,\mathrm{A}\], and \[I\] point away. What is the unknown current?
