Download App

Electronics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectronics1 Mark
MCQ
Assertion : A transistor amplifier in common emitter configuration has a low input impedence.
Reason : The base to emitter region is forward biased.
  • ✓
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • C
    If assertion is true but reason is false
  • D
    If the assertion and reason both are false.
✓

Answer

Correct option: A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
 If both assertion and reason are true and the reason is the correct explanation of the assertion.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electronics→Electronics — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Two tangent galvanometer coils of same radius connected in series. The current flowing produces deflection of $60^o$ and $45^o$. The ratio of number of turns in coil is
→
Point charge $q$ moves from point $P$ to point $S$ along the path $PQRS$ (figure shown) in a uniform electric field $E$ pointing coparallel to the positive direction of the $X - $axis. The coordinates of the points $P,\,Q,\,R$ and $S$ are $(a,\,b,\,0),\;(2a,\,0,\,0),\;(a,\, - b,\,0)$ and $(0,\,0,\,0)$ respectively. The work done by the field in the above process is given by the expression
→
Through two parallel wires A and B, 10 and 2 ampere of currents are passed respectively in opposite direction. If the wire A is infinitely long and the length of the wire B is 2 m, the force on the conductor B, which is situated at 10 cm distance from A will be
→
If an electromagnetic wave propagating through vacuum is described by $E_y=E_0 \sin (k x-\omega t)$; $B_z=B_0 \sin (k x-\omega t)$, then
→
The unit of inductance is
→
A semiconductor is cooled from ${T_1}K$ to ${T_2}K.$ Its resistance
→
A nucleus of mass $M + \Delta m$ is at rest and decays into two daughter nuclei of mass $ \frac {M}{4}$&$\frac{3M}{4}$ each. Speed of light is $c.$ The speed of daughter nucleus of mass $\frac{M}{4}$ is
→
A solid metallic sphere has a charge +3Q. Concentric with this sphere is a conducting spherical shell having charge -Q. The radius of the sphere is a and that of the spherical shell is b(b > a). What is the electric field at a distance R(a < R < b) from the centre 
→
In the following Wheatstone bridge $P/Q = R/S$. If key $K$ is closed, then the galvanometer will show deflection
→
The resistance of an ammeter is $13\, \Omega$ and its scale is graduated for a current upto $100$ $amps$. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto $750$ $ampere$ by this meter. The value of shunt-resistance is 
→