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 B and E?

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 B and E?

संख्यात्मक
Advertisements

उत्तर

Apply Kirchhoff’s Law:

5(0.2) + R (0.2) + 15(0.2) = 8 − 3

⇒ R = 5Ω

VBE = 5(0.2) = 1V

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2011-2012 (March) All India Set 1

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 the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of  (11/5) Ω?


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


Find the circuit in the three resistors shown in the figure.


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?


On which conservation principle is Kirchoff's Second Law of electrical networks based?


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 the principle of potentiometer.


A copper wire of 10-6 m2 area of cross-section, carries a current of 2 A. If the number of electrons per cubic meter is 8 × 1028, calculate the current density and average drift velocity.


Figure shows current in a part of an electrical circuit. Then current I is ______.


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 ______.


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?


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.


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:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×