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The double energy transients occur in the
In an R-L-C circuit, v(t) = 20 sin (314 t + 5 p/6) and i(t) = 10 sin (314 t + 2p/3). The p.f of the circuit is
The ability of a radio receiver to discriminate between different input signals and to accept only one definite signal is called its
A sinusoidal current having peak value of 7.07 A is superimposed on dc of 5A. If a hot-wire ammeter is used to measure the combined current in the circuit, it will indicate __________ ampere.
In an ac circuit that delivers constant power at varying p.f., the current is
The impedance of a coil above self-resonant frequency is
Which of the following statement is false?
A parallel ac circuit in resonance will
Wire-wound resistors are unsuitable for use at high frequencies because they
A steel bar needs 1200 AT to magnetise it. The voltage that must be applied to the magnetising coil of 100 turns and 10 Ω resistance is __________ volt.
The voltage induced in a loop of wire rotating in a strong and steady magnetic field is
P(s) = s4 + s3 + 2s2 + 4s + 3Q(s) = s4 + 2s3 + s Which one of the following statements in correct for above P(s) and Q(s) polynomials?
A two port network is reciprocal if and only if
Consider the following statements for a driving point function F(jω): Re F(jω) is an even function of ω and is 0 or positive for all values of ω.Im F(jω) is an even function of ω and is 0 or positive for all values of ω.Re F(jω) is an odd function of ω and is 0 […]
Consider the following statements associated with two port networks. Z12 = Z21Y12 = Y21h12 = h21AD – BC = 1 Which one of the statement given above are correct?
A 2-terminal network consists of one of the RLC elements. The elements is connected to an ac supply. The current through the element is 1 A. When an inductor is inserted in series between the source and the element, the current through the element becomes 2 A. What is this element?
A resistor R of 1 Ω and two inductor L1 and L2 of inductances 1 H and 2 H respectively, are connected in parallel. At some time, the current through L1 and L2 are 1 A and 2 A, respectively. The current through R at time t = ∞ will be
In a network containing resistances, reactances the root of the characteristic equation give for the circuit
Which one of the following statements is not a property of RL driving point impedance?
L/C has the dimension of
A network N is dual of network N if
Consider the following: Energy storage capability of basic passive elements is due to the fact thatresistance dissipates energycapacitance stores energyinductance dissipates energy Which of the above is/are correct?
The quantum numbers associated with electron motion are designed as
The two conductors of a single phase transmission line suspended in air carry currents in opposite directions. The force per unit length on each conductor varies
The network has 10 nodes and 17 branches. The number of different node power voltages would be
A capacitor used for power factor correction in single- phase circuit decreases
The transition of electron from energy level W1 to W2 is associated with emission or absorption of electro magnetic radiation of frequency f such that
For a two- port reciprocal network, the output open circuit voltage divided by the input current is equal to
Consider the following statement : If a network has an impedance of (1 – j) as a specific frequency, the circuit would consist of series R and CR and LR, L and C Which of the statement are correct?
A network contains only independent current source and resistors. If the values of all resistors are doubled, the value of the node voltage
Schrodinger wave equation is a
When Schrodinger equation is applied to the motion of electron in the field of protons, the physically acceptable solutions for the wave function exist for quantum number which are
The first and the last critical frequencies (singularities) of a driving point impedance function of a passive network having two kind of elements, are a pole and a zero respectively. The above property will be satisfied by
Measurement of an unknown voltage with a dc potentiometer loses its advantage of open circuit measurement when
While using Maxwell bridge, the Q factor of a coil is obtained as
Consider the following statements : Tellegen’s theorem is applicable to any lumped networks.The reciprocity theorem is applicable to linear bilateral networks.Thevenin’s theorem is applicable to two- terminal linear active networks.Norton’s theorem is applicable to two-terminal linear active networks. Which of these statement are correct?
The capacitance of a parallel plate capacitor varies as per the equation C(t) = C0 (1 – cos ωt). It is connected to a battery of V volts. The equation for current is
Bandwidth will be
A function f(t) = k is
A function f(t) = k eat is __________ for (a > 0).