The observation when the secondary winding of a current transformer is open-circ

Question

The observation when the secondary winding of a current transformer is open-circuited is?

Options:

A . The whole of the primary current produces a large value of flux in the core thereby producing a large voltage in the secondary winding

B . The large voltage may act as a safety hazard for the operators and many even raptures the insulation

C . When the large magnetizing force is taken off, it leaves a large value of residual magnetism

D . When the large magnetizing force is taken off, it leaves a small value of residual magnetism

Answer: Option B
Answer: (b).The large voltage may act as a safety hazard for the operators and many even raptures the insulation

Was this answer helpful ?

Next Question

More Questions on This Topic :

Question 1. A (350 A/ 7A), 50 Hz current transformer has a primary bar. The secondary burden is a pure resistance of 1 Ω and it dr....requires 350 AT for magnetization. Find the percentage ratio error.

Question 2. A 200/1 Current Transformer (CT) is wound with 400 turns on the secondary on a toroidal core. When it carries a current ....by 1, the new ratio error (in %) will be?

Question 3. The CT supplies current to the current coil of a wattmeter power factor meter, energy meter and, an ammeter. These are c....meter, energy meter and, an ammeter. These are connected as?

Question 4. A PT is a device which is ___________....

Question 5. In a moving iron meter, the deflection torque is proportional to?....

Question 6. The full-scale deflection current of a meter is 4 mA and its internal resistance is 400Ω. This meter is to have full d....is the value of the series resistor to be used?

Question 7. The full-scale deflection current of an ammeter is 4 mA and its internal resistance is 400Ω. If this meter is to have ....is the value of the shunt resistance to be used?

Question 8. A 50 Hz voltage is measured with a moving iron voltmeter and a rectifier type AC voltmeter connected in parallel. If the....Vb respectively. Then the form factor may be estimated as?

Question 9. A PMMC rated as 100 μA is used in a rectifier type of instrument which uses full wave rectification. What is the sensit....full wave rectification. What is the sensitivity on sinusoidal AC?

Question 10. A moving iron ammeter produces a full-scale torque of 240 μN-m with a deflection of 120° at a current of 10 A. the....of self-inductance (μH/rad) of the instrument at full scale is?

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI

Tabulation - Test Paper 2 Data Interpretation Reasoning & DI

Test Paper 1 Direction Sense Test Reasoning & DI

ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0

GFM Combined 1 Free Revision Test SAIL JO E-0