$\alpha=0.99 \quad R_L=4.5 \,k \Omega \quad R_I=50 \,\Omega$
$A_v=\alpha \cdot \frac{R_L}{R_I}=0.99 \times \frac{4.5}{50} \times 10^3$
$\therefore A_v=0.0891 \times 10^3=89.1$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion $A:$ Two metallic spheres are charged to the same potential. One of them is hollow and another is solid, and both have the same radii. Solid sphere will have lower charge than the hollow one.
Reason $R:$ Capacitance of metallic spheres depend on the radii of spheres.
In the light of the above statements, choose the correct answer from the options given below.
| List $I$ | List $II$ |
| $(A)$ Microwave | $(I)$ $400\,nm$ to $1\,nm$ |
| $(B)$ Ultraviolet | $(II)$ $1\,nm$ to $10^{-3}\,nm$ |
| $(C)$ $X-$Ray | $(III)$ $1\,mn$ to $700\,nm$ |
| $(D)$ Infra-red | $(IV)$ $0.1\,m$ to $1\,mm$ |
Choose the correct answer from the options given below:
