हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान कक्षा ११

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.

Advertisements
Advertisements

प्रश्न

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.

विकल्प

  • A and B are correct

  • A is correct but B is wrong

  • B is correct but A is wrong

  • A and B are wrong

MCQ
Advertisements

उत्तर

A and B are correct

 

According to Kirchhoff's junction law, the net charge coming towards a point should be equal to the net charge going away from that point in the same time. It follows from the principle of conservation of charge.

The loop law follows from the fact that electrostatic force is a conservative force and the work done by it in any closed path is zero.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 32: Electric Current in Conductors - MCQ [पृष्ठ १९७]

APPEARS IN

एचसी वर्मा Concepts of Physics Volume 1 and 2 [English]
अध्याय 32 Electric Current in Conductors
MCQ | Q 11 | पृष्ठ १९७

संबंधित प्रश्न

Kirchhoff's voltage law and current law are respectively in accordance with the conservation of .................................. .

  1. charge and momentum
  2. charge and energy
  3. energy and charge
  4. energy and momentum

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?


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.


Given the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of (11/3) Ω?


Given the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of  (6/11) Ω?


Determine the equivalent resistance of networks shown in Fig.


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?


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.


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.


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?


In the circuit shown in the figure below, E1 and E2 are two cells having emfs 2 V and 3 V respectively, and negligible internal resistance. Applying Kirchhoff’s laws of electrical networks, find the values of currents l1 and I2.


State Kirchhoff ’s voltage rule.


State the principle of potentiometer.


State and explain Kirchhoff’s rules.


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.


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.


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 ______.


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.


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?


Why are alloys used for making standard resistance coils?


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.


The circuit in figure shows two cells connected in opposition to each other. Cell E1 is of emf 6V and internal resistance 2Ω; the cell E2 is of emf 4V and internal resistance 8Ω. Find the potential difference between the points A and B.


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.


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 ______.


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:


A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×