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QUESTION 1

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QUESTION 1:
DIFFERENTIATE BETWEEN THE ELECTROSTAIC DEFLECTION NAD ELECTROMAGNETIC DEFLECTION IN A CATHODE RAY TUBE?
ANSWER:-

1. ELECTROSTATIC DEFLECTION

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? IT IS THE METHOD OF MOVING THE CHARGED PARTICLE BY APPLING ELECTRIC FIELD BETWEEN THE DEFLECTION PLATES IN CRT.
? ELECTROSTACTIC DEFLECTION USE ONLY ELECTRIC FIELD ON THE CHARGED PARTICLE.
? THE AMOUNT OF CHARGE IS GIVEN TO THE PLATES CONTROLS IN VARIATION OF DEFLECTION.

2. ELECTROMAGNETIC DEFLECTION
? IT IS THE METHOD OF MOVING THE CHARGED OARTICLE BY APPLYING MAGNETIC FIELD BETWEEN THE DEFLECTION PLATES IN CRT.
? ELECTROMAGNETIC DEFLECTION USE ONLY MAGNETIC FIELD ON THE CHARGED PARTICLE.
? THE AMOUNT OF POLARITY OR STRENGHT OF MAGNETIC FIELD CONTROLS THE VARIATION IN DEFLECTION.

QUES-2: EXPLAIN AUTO-ZERO MECHANISM IN DIGITAL MULTIMETER?
ANSWER:
IN MEASUREMENT OF TIME IN DIGITAL MULTIMETER THEN THERE IS TWO CONDITION APPEAR WHICH IS AS FOLLOWS:-
• AUTOZERO ON
WHEN THE INSTRUMENT DISSCONNECTED FROM CIRCUIT AND READ ZERO.THEN IT IS SUBTRACTED ZERO READING TO PREVIOUS READING . THIS CAUSE OFF SETS VOLTAGES IN THE INSTRUMENT.
• AUTOZERO 0FF
WHEN THE INSTRUMENT USES THE LAST ZERE READING AND SUBTRACTED TO PREVIOUS READING OF EVERY MESSUREMENT THEN IT CONATAIN A NEW ZERO READING.

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