MCQ
The value of amplification factor from the following graph will be
- ✓$10$
- B$50$
- C$25$
- D$40$
✓
Answer
Correct option: A.
$10$
$10$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Surface temperature of the sun is of the order of(a) 5000 K(b) 7000 K(c) 6000 K(d) 12000 K
Suppose a tunnel is dug along a diameter of the earth. A particle is dropped from a point, a distance h directly above the tunnel. The motion of the particle as seen from the earth is:
- Simple harmonic.
- Parabolic.
- On a straight line.
- Periodic.
Following operations can be performed on a capacitor:
$X -$ connect the capacitor to a battery of emf $\epsilon.$
$Y -$ disconnect the battery.
$Z -$ reconnect the battery with polarity reversed.
$W -$ insert a dielectric slab in the capacitor.
→$X -$ connect the capacitor to a battery of emf $\epsilon.$
$Y -$ disconnect the battery.
$Z -$ reconnect the battery with polarity reversed.
$W -$ insert a dielectric slab in the capacitor.
- In $\text{XYZ} ($perform $X,$ then $Y,$ then $Z)$ the stored electric energy remains unchanged and no thermal energy is developed.
- The charge appearing on the capacitor is greater after the action $\text{XWY}$ than after the action $\text{XYW}$.
- The electric energy stored in the capacitor is greater after the action $\text{WXY}$ than after the action $\text{XYW}.$
- The electric field in the capacitor after the action $\text{XW}$ is the same as that after $W$.
The device is based on the principle of mutual induction is:
The electrons are emitted in the photoelectric effect from a metal surface (a) Only if the frequency of the incident radiation is above a certain threshold value(b) Only if the temperature of the surface is high(c) At a rate that is independent of the nature of the metal(d) With a maximum velocity proportional to the frequency of the incident radiation
Which theory of light is wave theory or particle theory?
A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field. This observation establishes that bismuth is(a) Diamagnetic(b) Paramagnetic(c) Ferri-magnetic(d) Antiferro-magnetic
A charged particle moves through a magnetic field in a direction perpendicular to it. Then the:
The work function of a metal is $1.6 \times 10^{-19} J$. When the metal surface is illuminated by the light of wavelength $6400 \mathring A ,$ then the maximum kinetic energy of emitted photo-electrons will be $($Planck's constant $h = 6.4 \times 10^{-34}Js)$
→In the circuit shown in the figure, the current through
