SSC JE / State Electricity Boards JE Electrical Exams QUIZ-9

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Question 1

The curve showing the relation between the terminal voltage and load current of a d.c. generator is called its…………….. characteristic.

• Amagnetic
• Bexternal
• Cinternal
• Dnone of the above

Question 2

A transformer has iron loss of and full-load copper loss of The maximum efficiency of the transformer would occur when the total loss is

• A
• B
• C
• D

Question 3

The demand factor is generally

• Aless than 1
• Bmore than 1
• Cequal to 1
• Dnone of the above

Question 4

Balanced earth-fault protection is generally provided for

• Asmall-size alternators
• Bmedium-size alternators
• Clarge-size alternators
• DNone of the above

Question 5

An R-L series a.c. circuit has 15 V across resistor and 20 V across the inductor. The supply voltage is ……..

• A35V
• B5V
• C25 V
• D

Question 6

If the full-scale current of a meter is then its sensitivity is

• A
• B
• C
• Ddata insufficient

Question 7

In the below figure the minimum input voltage required (V_BE = 0.7 V) to turn on the transistor is ?
            

• A6 V
• B16.7 V
• C6.7 V
• D14.8 V

Question 8

Which one of the following may be the relative permittivity of a dielectric?

• A0
• B1/3
• C-2
• D4

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