In a transformer the resistance between its primary and secondary should be?

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In a transformer the resistance between its primary and secondary should be?

In a transformer the resistance between its primary and secondary should be infinity.

Related questions

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When secondary of a current transformer is open-circuited its iron core will be?

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A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary?  (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

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Compare primary and secondary instruments.

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The secondary of a current transformer is always short-circuited under operating conditions because it?

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Write difference between absolute & secondary instrument.

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Increasing the number of turns of wire on the secondary of a transformer will  (A) Decrease the secondary current (B) Increase the primary current (C) Have no effect on the secondary current (D) Increase the secondary current

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A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he

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What is the mathematical relationship between resistance and conductance?

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What is the relationship between power and resistance?

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If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then  (A) zero sequence currents are present on both sides of the transformer  (B) zero sequence currents are absent on both sides of the transformer  (C) zero sequence currents are present on the secondary side but not on the primary side  (D) zero sequence currents are present on the primary side but not on the secondary side

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What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

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For a pulse transformer, the material used for its core and the possible turn ration from primary to secondary are respectively   (A) ferrite : 20 : 1 (B) laminated iron : 1 :1 (C) ferrite : 1 : 1 (D) powered iron : 1: 1

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The path of magnetic flux in a transformer should have?

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Consider a cube of material of sides 1 cm with a resistance of 0.003 Ω between its opposite faces. What is the resistance if the same volume of the material is drawn into a length of 50 cm with a uniform cross – section? A) 0.003 Ω B) 0.15 Ω C) 7.5 Ω D) None of these

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If the secondary turns of a transformer are doubled and at the same time primary voltage is reduced to half then the secondary voltage will

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Primary and Backup Protection

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What is the definition of a primary instrument?

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In a transformer the energy is conveyed from primary to secondary?

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A 1:5 step-up transformer has 120V across the primary and 600 ohms resistance across the secondary. Assuming 100% efficiency, the primary current will be:  (A) 0.2 Amp. (B) 5 Amps. (C)10 Amps. (D) 20 Amps

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The maximum load that a power transformer can carry is limited by its?

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State the meaning of absolute instrument and secondary instrument.

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When measuring insulation resistance of cables using d.c. source, the galvanometer used should be initially short circuited because  (A) Cables have a low value of capacitance which draws a high value of charging current (B) Cables have a low value of initial resistance (C) Cables have a high value of capacitance which draws a high value of charging current (D) Cables have a low value of capacitance and initial resistance

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For maximum transfer of power, internal resistance of the source should be?

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What should be the ideal resistance of ammeter ?

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One 200 V, 100 W bulb is connected in series with primary of a 200 V, 10 kVA transformer. If its secondary is kept open circuited, then the bulb would have (1) Full brightness (2) Poor brightness (3) A little less than full brightness (4) More than full brightness

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The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary output voltage will be (A) 3.6 V. (B) 2.5 V. (C) 3.0 V. (D) 6.0 V.

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A 230 V/460 V single-phase transformer operating at 20 A and unity power factor has primary referred resistance of 0.2 Ω and reactance of 0.5 Ω. The approximate primary induced emf is (A) 216 V (B) 226 V (C) 234 V (D) 236 V

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A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is

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A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is? A.0.2 B.0.4 C.5 D.25

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If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ohms? A.250 ohms B.25 ohms C.6,250 ohms D.62,500 ohms

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In a three phase transformer, if the primary side is connected in star and secondary side is connected in delta, the angle difference between phase voltage in the two cases will be: (A) delta side will lag by -30° (B) star side will lag by -30° (C) delta side will lead by 30° (D) star side will lead by -30°

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The dielectric strength of transformer oil is expected to be?

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Reduction in core losses and increase in permeability are obtained with transformer employing?

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State the meaning of secondary instrument. Classify secondary instruments.

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Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

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