ElectronicElectronic

THERMIONIC EMISSION

CURRENT FROM 6VPASS THROUGH

FILAMEN(CATHODE)

VACUME

(CATHODE) BECOME

WHITE HOT & EMITS CATHODE RAY THERMIONIC

EMISSION

ELECTRON ATTRACTED

TO ANODE

e

eee

e e

SHADOW

CATHODE RAY OSCILLOSCOPE

TO MEASURE DIRECT CURRENT (DC)

& ALTERNATING CURRENT

(AC) VOLTAGE

CATHODE RAY OSCILLOSCOPE(CRO)

Deflection

2Electron emitted from filamen

1Filamen heated

3 Electron move to screen4 A spot of light seen at d centre of screen

SEMICONDUCTOR

N-TYPE SEMICONDUCTOR P-TYPE SEMICONDUCTOR

N-TYPE SEMICONDUCTOR P-TYPE SEMICONDUCTOR

FORWARD BIASED

REVERSE BIASED

P-type N-type

TRANSISTOR

NPN TRANSISTOR PNP TRANSISTOR

OUTPUT 1if ALL input 1

OUTPUT 1if ONE or BOTH

input 1

OUTPUT OPPOSITE INPUT

OUTPUT OPPOSITE AND GATE

AND

0001

1

OUTPUT OPPOSITE OR GATE

1

1

LOGICGATES

ANS:B

ANS : A

ANS:OR GATE