Semiconductor Devices Test

Result

Semiconductor Devices Test - 100

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Weekly Quiz Competition

Question 1
4 / -1

For a given triode μ = 20. The load resistance is 1.5times the anode resistance. The maximum gain will be

A
16

B
12

C
10

D
None of these

Solution
Question 2
4 / -1

The voltage gain of a triode depends upon

A
Filament voltage

B
Plate voltage

C
Plate resistance

D
Plate current
Question 3
4 / -1

In a triode valve

A
If the grid voltage is zero, then plate current will be zero

B
If the temperature of filament is doubled, then the thermionic current will also be doubled

C
If the temperature of filament is doubled, then the thermionic current will nearly be four times

D
At a definite grid voltage the plate current varies with plate voltage according to Omh's law
Question 4
4 / -1

The amplification factor of a triode valve is 15. If the grid voltage is changed by 0.3 volt the change in plate voltage in order to keep the plate current constant (in volt) is

A
0.02

B
0.002

C
4.5

D
5.0

Solution
Question 5
4 / -1

A
100 kilo-ohms static

B
1000 kilo-ohms static

C
1000 kilo-ohms dynamic

D
100 kilo-ohms dynamic

Solution
Question 6
4 / -1

A triode has a mutual conductance of 2 × 10^–3 mho andan amplification factor of 50. The anode is connected through a resistance of 25 × 10³ ohms to a 250 volts supply. The voltage gain of this amplifier is

A
50

B
25

C
100

D
12.5

Solution
Question 7
4 / -1

14 × 10¹⁵ electrons reach the anode per second. If thepower consumed is 448 milliwatts, then the plate (anode) voltage is

A
150 V

B
200 V

C
14 × 448 V

D
448/14 V

Solution
Question 8
4 / -1

In the circuit of a triode valve, there is no change in the plate current, when the plate potential is increased from 200 volt to 220 volt and the grid potential is decreased from – 0.5 volt to – 1.3 volt. The amplification factor of this valve is

A
15

B
20

C
25

D
35

Solution
Question 9
4 / -1

If the amplification factor of a triode (μ) is 22 and its plate resistance is 6600 ohm, then the mutual conductance of this valve in mho is

A

B
25 × 10^–2

C
2.5 × 10^–2

D
0.25 × 10^–2

Solution
Question 10
4 / -1

The correct relation for a triode is

A

B

C
Both (a) and (b)

D
None of these