TSGENCO Practice Quiz 12

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Question 1

In Fig., what is the signal voltage?

• A0.100002 V
• B0.10003 V
• C0.10004 V
• Dnone of the above

Question 2

When negative voltage feedback is applied to an amplifier, the power gain of the amplifier…………………..

• Ais increased
• Bis decreased
• Cremains same
• Dbecomes zero

Question 3

A battery of e.m.f. 3 V and internal resistance is connected to a copper voltameter and a current of 1.5 A flows in the circuit. What is the resistance of the voltameter?

• A
• B
• C
• D

Question 4

If the magnetising force required at the working flux density in Fig. is 400 AT/m (from B-H curve), the required number of turns is

• A120
• B240
• C180
• D320

Question 5

A constant current is applied between the two ends of a metallic wire of uniform area of cross-section. Some heat is developed. The heat is doubled if

• Alength half  and radius are doubled
• Bboth length and radius are doubled
• Cthe radius of wire is doubled
• Dthe length of wire is doubled

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