Distinguish between ammeter and voltmeter
Explain wheatstone bridge
What is the resistance of ideal voltmeter
Infinite
Define potential gradient
Potential difference for unit length of potential wire
What is shunt
Very small resistance used to convert galvanometer into ammeter
Connected parallel with galvanometer
Define potential gradient of potential wire
Define as potential difference per unit length
How will you convert moving coil galvanometer into ammeter
First law of kichchhoff law
Current law or junction law
Total current at any junction is always zero
Second law of Kichchhoff
Some of EMF and potential difference across resistance is always zero
Difference between potentiometer and voltmeter
What do you mean by logic gate
Digital circuit with one or more input and single output
What is light emitting diode? Draw circuit diagram
Light emitting diode is a diode which emits light when large forward current passes to it
What is voltage regulator
Voltage regulator refers p to maintain constant output voltage respective of change in input voltage
Explain working of zenor diode as voltage regulator
Name the logic Gate having single input and single output
Not gate
Write a boolean expression for exclusive OR (X-OR) GATE
State the dimensions of emissive power of a body.
Advantage of LED
Long lifetime
Energy efficiency
Environment friendly
Almost no warm up point
Explain the working of LED
Diode is forward bias
Electron from semiconductor conduction band recombine with holes from valency band releases sufficient energy to produce proton
Higher forward current higher light output
Disadvantages of LED
High initial cost
Temperature dependence
Voltage sensitivity
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