Efficiency of a recorder is determined using ________
1.paper
2.chart
3. voltmeter
4.oscilloscope
Electronic recorders are of _______
1. 2 types
2.4 types
3.10 types
4.15 types
In a strip chart recorder ____
1.biological quantity is measured
2.chemical quantity is measured
3.physical quantity is measured
4.no quantity is measured
Response time for gas-filled phototubes is _______
1.zero
2. intermediate
3. fast
4.slow
A galvanometer based recorder works on the principle of ________
1. Van der Wall’s effect
2.D’Arsonval movement
3. Paschen effect
4.Azhimuthal quatum number
A physical quantity is recorded to preserve the details.
1. True
2.False
3.all of the above
4.None of the mentioned
Basic elements of a strip chart recorder are _____
1.chalk and board
2.pen and pencil
3.pencil and paper
4. pen and chart paper
How many types of graphic recorders are there?
1. five
2.ten
3. three
4.one
How many types of tracing systems are used in graphical representation?
1.two
2. five
3.ten
4.one
Non-electrical quantities are measured directly.
1. True
2.False
3.all of the above
4.None of the mentioned
Optocoupler consists of a phototransistor and a led.
1.True
2.False
3.all of the above
4.None of the mentioned
Photoconductors are made of _______
1. thick layer of semiconductor
2.thin layer of semiconductor
3.capacitive substrate
4. inductive substrate
Phototubes are very quick in response to light.
1.True
2.False
3.all of the above
4.None of the mentioned
Recorder is a _____
1.measuring instrument
2.voltage source
3. current divider
4.musical tool
Reverse leakage current in a transistor _______
1.is affected by light
2.is not affected by light
3. increases with a decrease in pressure
4.decreases with increase in temperature
When an open circuited pn junction is illuminated then _______
1.resistance increases
2.there is no effect
3.electron hole pairs are formed
4.capacitance increases