SSC JE / State Electricity Boards JE Electrical Exams QUIZ-15

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Question 1

The armature torque of a d.c. motor running at is and shaft torque is The iron and friction losses are

• A
• B
• C
• D

Question 2

The inductive reactance of a transformer depends on

• Ae.m.f.
• Bm.m.f.
• Cleakage flux
• Dmagnetic flux

Question 3

Two fuse wires of the same material have fusing currents of 10A and 5A. The 10A fuse will have

• Asmaller diameter
• Blarger diameter
• Cthe same diameter as 5A fuse
• Dnone of the above

Question 4

A thermal power station has a boiler efficiency of 85% and turbine efficiency of 90%. The thermal efficiency of the station is

• A52.5%
• B29%
• C76.5%
• Dnone of the above

Question 5

Application of Norton’s theorem in a circuit results in

• Aa current source and an impedance in parallel
• Ba voltage source and an impedance in series
• Can ideal voltage source
• Dan ideal current source

Question 6

Under the condition of maximum power transfer, a voltage source is delivering a power of 30 W to the load. The power generated by the source is …………………………….

• A45 W
• B30 W
• C60 W
• D90 W

Question 7

The value of of a transistor is……………….

• Amore than 1
• Bless than 1
• C1
• Dnone of the above

Question 8

When the separation between two charges is increased, the electric potential energy of the charges

• Aincreases
• Bdecreases
• Cremains the same
• Dmay increase or decrease

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