English

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

Question

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?

Numerical
Advertisements

Solution

Apply Kirchhoff’s Law:

5(0.2) + R (0.2) + 15(0.2) = 8 − 3

⇒ R = 5Ω

VBE = 5(0.2) = 1V

shaalaa.com
  Is there an error in this question or solution?
2011-2012 (March) All India Set 1

Video TutorialsVIEW ALL [2]

RELATED QUESTIONS

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

Determine the current in each branch of the network shown in 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?


State and explain Kirchhoff’s rules.


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.


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:


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?


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×