Question: When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?

• 1. 1 n-mho
• 2. 106 mho
• 3. 1 milli-mho
• 4. none of the above

Question: Which of the following can have negative temperature coefficient _____________?

• 1. Compounds of silver
• 2. Liquid metals
• 3. Metallic alloys
• 4. Electrolytes

Question: Conductance : mho :: ____________?

• 1. resistance : ohm
• 2. capacitance : henry
• 3. inductance : farad
• 4. lumen : steradian

Question: 1 angstrom is equal to______________?

• 1. 10-8 mm
• 2. 10″6 cm
• 3. 10″10 m
• 4. 10~14 m

Question: One newton meter is same as_____________?

• 1. one watt
• 2. one joule
• 3. five joules
• 4. one joule second

Question: If the anode current is 800 A, then the amount of current required to turn off the GTO is about____________?

• 1. 20 A
• 2. 200 A
• 3. 600 A
• 4. 400 A

Question: What is used to protect the SCR from over current ________________?

• 1. CB and fuse.
• 2. Heat sink.
• 3. Snubber circuit.
• 4. Voltage clamping device.

Question: Under normal operating condition voltage clamping device offers impedance of_________?

• 1. high value.
• 2. low value.
• 3. zero value.
• 4. moderate value.

Question: Which semiconductor device acts like a diode and two transistor?

• 1. UJT
• 2. Diac
• 3. Triac
• 4. SCR

Question: Under over voltage condition impedance offered by the voltage clamping device is__________?

• 1. low
• 2. High
• 3. moderate
• 4. infinity