# What is Ampere's law equation?

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What is Ampere's law equation?         Ampere's law

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For a given base voltage and base volt-amperes, the per unit impedance value is x. For the doubled base values of both voltage and volt-amperes, the per unit impedance will be (a) 2x (b) 0.25x (c) 0.5x (d) no change

A 50 Hz, 4-pole, 500 MVA, 22 kV turbo-generator is delivering rated megavolt amperes at 0.8 power factor. Suddenly a fault occurs reducing in electric power output by 40%. Neglect losses and assume constant power input to the shaft. The accelerating torque in the generator in MNm at the time of fault will be  (A) 1.528 (B) 1.018 (C) 0.848 (D) 0.509

The number of micro amperes in 2 milli amperes is? A.2 μA B.20 μA C.200 μA D.2,000 μA

The ratio of full -load volt-amperes to short-circuit volt-amperes is equal to :

If the transmission line is loaded with leading reactive volt amperes, there will be rise of voltage at the receiving end and this (a) increases (b) decreases (c) remains same with the increase in the length of line (d) none of these

A current of 4 amperes flowing for 45 minutes deposits 1.062 gm of metal at cathode. Calculate the equivalent weight of the metal. (Given 1 Faraday = 96500 C)

Four amperes of current are measured through a 24 ohms resistor connected across a voltage source. How much voltage does the source produce? A.960 V B.9.6 V C.96 V D.8 V

The characteristic equation of a simple servo system is s2+6s+25=0. Damping factor of the system is: A) 3.2 B) 2.4 C) 1.8 D) 2.9

The angle δ in the swing equation of a synchronous generator is the  (A) angle between stator voltage and current (B) angular displacement of the rotor with respect to the stator (C) angular displacement of the stator mmf with respect to a synchronously rotating axis. (D) angular displacement of an axis fixed to the rotor with respect to a synchronously rotating axis

The characteristic equation for a closed loop system with forward gain K is s4 + 4s3 + 8s2 + 6s + K = 0. The critical gain value Kc for stability should not exceed  (a) 3.25 (b) 9.75 (c) 13.0 (d) 23.3

The swing equation for a synchronous machine is based on (A) relative motion between load angle and stator magnetic field (B) maximum power flow possible through a particular point (C) net torque and angular displacement (D) relation between excitation voltage and excitation current

A discrete time system is stable if all the roots of the characteristic equation. lie (a) Outside the circle of unit radius (b) Within the circle of unit radius (c) Outside the circle of radius equal to 3 -units (d) On the circle of infinite radius

In the case of second order differential equation if the damping ratio is unity, then the poles are  A) Equal, positive and real B) Imaginary and complex conjugate C) Equal, negative and real D) None of the above

In the solution of load flow equation, Newton Raphson (NR) method is superior to the GaussSeidal (GS) Method, because the:  (A) Convergence characteristic of the NR methods are not affected by selection of slack bus (B) Number of iterations required in the NR method is not independent of the size of the system (C) Time ... the NR method is less when compared to the GS method (D) Number of iteration required in the NR method is more than compared to that in the GS method

If the characteristics equation of a closed loop system is s2+2s+2=0, then the system is  (A) Over damped (B) Critically damped (C) Under damped (D) Undamped

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The equation V·j = 0 is known as : (A) Poissons’s equation (B) Laplace equation (C) Continuity equation (D) Maxwell equation

The equation of 50 Hz current sine wave having r.m.s. value of 60 A is?

Which law is synonymous to the occurrence of diamagnetism?   (a) Ampere’s law (b) Maxwell’s law (c) Coulomb’s law (d) Lenz’s law

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The Kirchoff's law for a.c. is applicable upon consideration of -  a) Phasor sum b) Algebraic sum c) Progression sum d) Linear sum

Ohm’s law is applicable to : (A) Semi-conductors (B) Vacuum tubes (C) Electrolytes (D) Semiconductors and Vacuum tubes

Kirchhoff s law is not applicable to circuits with?

Kirchhoff s law is applicable to?

Kirchhoffs voltage law is related to?

Kirchhoffs current law is applicable to only?

The condition for the validity under Ohm's law is that?

why ohm's law is not applicable for ac circuit?

is Ohms law applicable to vacuum tubes?