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THERMIONIC

EMISSION

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CURRENT FROM 6VPASS THROUGH

FILAMEN

(CATHODE)

VACUME

(CATHODE)BECOME

WHITE HOT & EMITS

CATHODE RAY THERMIONICEMISSION

ELECTRONATTRACTED

TO ANODE

e

ee

ee e

SHADOW

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CATHODE RAY OSCILLOSCOPE

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TO MEASURE DIRECTCURRENT (DC)

&ALTERNATING CURRENT

(AC)

VOLTAGE

CATHODE RAY OSCILLOSCOPE(CRO)

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Deflection

2Electron emitted from filamen1Filamen heated

3 Electron move to screen

4 A spot of light seen at d centre of screen

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N-TYPE SEMICONDUCTOR P-TYPE SEMICONDUCTOR

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N-TYPE SEMICONDUCTOR P-TYPE SEMICONDUCTOR

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FORWARD BIASED

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REVERSE BIASED

P-type N-type

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TRANSISTOR

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NPN TRANSISTOR PNP TRANSISTOR

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OUTPUT 1if ALL input 1

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OUTPUT 1if ONE or BOTH

input 1

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OUTPUT OPPOSITE AND GATE

AND

000

11

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OUTPUT OPPOSITE OR GATE

1

1

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ANS:B

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ANS : A

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