Question

Please answer both questions

Answer 1

Answer:

Effective resistance = 50 Ω.

current = I = 0.5 amperes.

Explanation:

Here,   $R_{2}, R_{3}$ are in parallel combination.

So, effective resistance of $R_{2}, R_{3}$ =  $\frac{R_{2}R_{3}}{R_{2}+R_{3}}$

                                                       =  $\frac{20*30}{20+30}$  = 12 Ω.

Now, the combination  of $R_{2}, R_{3}$ is in series with $R_{1}$ .

Therefore, effective resistance,$R_{eff}$ = 12 + $R_{1}$

                                                            = 12 + 38 = 50 Ω.

Applying ohm's law,

    V = IR

=> 25 = I(50)

=> I = 0.5 amperes.

Answer 2

Answer:

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar. 5 - 8