In the space charge limited region for vacuum tube diode for plate voltage 400 and 200 volts. The plate current and IP1 and IP2 have ratio:

Question

In the space charge limited region for vacuum tube diode for plate voltage 400 and 200 volts. The plate current and IP1 and IP2 have ratio: (A)  1:2  (B)  2:1  (C)  1:2√2  (D)  2√2:1

Tardigrade Admin · Accepted Answer

Thermionic current IP propto VP3/2 (IP1/IP2)=( (400/200) )1/2=(23/2/1)=(2√2/1)=2√2:1

Q. In the space charge limited region for vacuum tube diode for plate voltage 400 and 200 volts. The plate current and $I_{P_{1}}$ and $I_{P_{2}}$ have ratio:

$1 : 2$

$2 : 1$

$1 : 22$

$22 : 1$

Thermionic current $I_{P} \propto V_{P}^{3/2}$ $\frac{I _{P_{1}}}{I _{P_{2}}} = (\frac{400}{200})^{1/2} = \frac{2 ^{3/2}}{1} = \frac{2 2}{1} = 22 : 1$

Q. In the space charge limited region for vacuum tube diode for plate voltage 400 and 200 volts. The plate current and IP1​​ and IP2​​ have ratio:

1:2

2:1

1:22​

22​:1