$A$ device is connected to a supply such that one end is connected to the positive terminal and the other to the negative terminal. If the connections are reversed and no current flows,the device is a .......

$A$ potential barrier of $0.4 \,V$ exists across a p-n junction. An electron enters the junction from the $n$-side with a speed of $6.0 \times 10^{5} \,ms^{-1}$. The speed with which the electron enters the $p$-side will be $\frac{x}{3} \times 10^{5} \,ms^{-1}$. The value of $x$ is ..............
(Given: mass of electron $= 9 \times 10^{-31} \,kg$,charge on electron $= 1.6 \times 10^{-19} \,C$.)

The current $I$ through the $10\, \Omega$ resistor in the given circuit is.......$mA$.

The figure shows two diagrams in which a diode and a resistance are connected. Out of the following statements,which one is $TRUE$?

For the given circuit of a $PN-$ junction diode,which of the following statements is correct?

In the figure shown, if the diode forward voltage drop is $0.2 \, V$, the voltage difference between $A$ and $B$ is (in $V$)