Electrician

For an electrical machine with C number of coils and P poles, the distance between the coils connected by an equalizer ring is?

1 Mark(s)

a) C/P
b) C/2
c) 2C/P
d) C/2P

What is constant for a charged spherical shell according to basic electrical energy?

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a) Electrical potential outside the spherical shell
b) Electrical potential inside the spherical shell
c) Electrical field outside the spherical shell
d) Electrical field inside the spherical shell

Which of the following elements of electrical engineering cannot be analyzed using Ohm’s law?

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a) Capacitors
b) Inductors
c) Transistors
d) Resistance

A Schering bridge can be used for the ______________

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a) protecting the circuit from temperature rises
b) testing capacitors
c) measuring voltages
d) measuring currents

In a rotating electrical machine with 2 poles on the stator and 4 poles on the rotor, spaced equally, the net electromagnetic torque developed is ____________

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a) maximum
b) zero or no torque is developed
c) minimum
d) none of the mentioned

How many electrons will constitute 2 Coulombs of electric charge?

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a) 6.24 * 1018 electrons
b) 12.48 * 1018 electrons
c) 1.602 * 1019 electrons
d) 3.204 * 1019 electrons

What is the number of primary turns in a 200/1000 V transformer if the emf per turn is 10V?

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a) 5
b) 10
c) 20
d) 40

What will be the current density of metal if a current of 30A is passed through a cross-sectional area of 0.5m2?

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a) 7.5 A/m2
b) 15 A/m2
c) 60 A/m2
d) 120 A/m2

Inductance control is obtained by _________

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a) using R5
b) using R4
c) using R2
d) using Lx

How many cycles will an AC signal make in 2 seconds if its frequency is 100 Hz?

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a) 50
b) 100
c) 150
d) 200

Electromagnetic torque in rotating electrical machinery is present when ________

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a) Both stator and rotor windings carry current
b) Air gap is uniform
c) Stator winding alone carries current
d) Rotor winding alone carries current

Where does electro-static shielding occur in a charged spherical shell?

1 Mark(s)

a) When electrical potential outside spherical shell is zero
b) When electrical potential inside the spherical shell is zero
c) When electrical field outside the spherical shell
d) Electrical field inside the spherical shell

Electrician : Question 1 of 12