1 Crore+ students have signed up on EduRev. Have you? Download the App 
If the length of a wire having uniform resistance R is stretched in m times with volume remaining same. What will be new resistance value?
A filament lamp of 40 W, 110 V is connected in series with resistance R. if the supply voltage is 230 V, the value of resistance R should be:
The temperature coefficient of resistance of material is given as:
Find the average current flow in the wire.
Given: type of wire: metallic
Total electrons drift across section per second = 10^{20}
Three equal resistors of 50 Ω each are connected in parallel across 110 V dc supply. What is the current through each branch if one of the resistors gets shorted?
For a network Thevenin equivalent is given by V_{th} = 10 V and R_{th} = 50 Ω. If this network is shunted by another 50 Ω ……… at load. What is the new Thevenin equivalent of the network?
A circuit consists of three elements connected in series; 10 V battery, 100 Ω and load resistor R_{L}. The maximum power that can be delivered to load would be?
Which of the following statements is/are correct about Norton Theorem?
A) The value of the current source is the short circuit current between the two terminals of the network.
B) Resistance is the equivalent resistance measured between the terminals of the network with all the energy. Sources are replaced by their internal resistance.
A current source and a voltage source are connected in parallel with a resistor as shown below. Suppose that v_{s} = 15 V, i_{s} = 5A and R = 5 Ω. What is the current i in the resistor and the power absorbed by the resistor?
For the network shown in the following figure the value of V_{s} which makes I_{0} = 7.5 mA is:
Which statement about electrical network and electrical circuit is CORRECT?
In the figure given below, the initial capacitor voltage is zero. Then after switch is closes at t = 0, Calculate the final steady state voltage across the circuit:
Consider the following given figure and calculate steadystate value of v(t) if i(t) is a unit step current.
An ac voltage has frequency of 50 Hz with peak amplitude of 100 V. In how many seconds after the zero value, voltage will attain the value of 86.6 V?
In an RL series circuit, the current flowing is 5 A, the voltage drop across R is 16 V and the voltage drop across L is 12 V. Then what is the impedance?
Express the voltage shown below in the general form v(t) = V_{m} sin (ωt + θ).
A current is produced when a voltage V = 30 sin 300 t is applied to a circuit. The estimated value of impedance is:
Two circuits having the same magnitudes of impedances are joined in parallel. The power factor of one circuit is 0.8 and of other is 0.6. The power factor of the combination is 
For parallel RLC circuit, which of the following statements is not correct?
2 videos1 docs55 tests

Test: Electromagnetic Fields Theory 1 Test  20 ques 
Test: Electromagnetic Fields Theory 2 Test  20 ques 
Test: Electromagnetic Fields Theory 3 Test  20 ques 
2 videos1 docs55 tests

Test: Electromagnetic Fields Theory 1 Test  20 ques 
Test: Electromagnetic Fields Theory 2 Test  20 ques 
Test: Electromagnetic Fields Theory 3 Test  20 ques 