Question

The solar constant at a place is 1.4kW/m2. Calculate the solar energy received by an area of 10m2 in 5 seconds

Answer 1

Given:

Solar constant (S) = 1.4 kW/m² = 1.4 × 10³ W/m²

Time (t) = 5 s

Area (A) = 10 m²

To Find:

Solar energy received (E)

Answer:

$\boxed{\bf Solar \: energy \: (E) = Solar \: constant \: (S) \times Time \: (t) \times Area \: (A)} \\ \\ \rm \implies E = 1.4 \times {10}^{3} \times 5 \times 10 \\ \\ \rm \implies E = 7 \times {10}^{4} \: J$

$\therefore$ $\boxed{\mathfrak{Solar \ energy \ received \ (E) = 7 \times 10^4 \ J}}$

Answer 2

Given

• The solar constant at a place is 1.4kW/m2.

We Find

• The solar energy received by an area of 10m2 in 5 seconds.

We used

Solar energy (E) = Solar constant (S) × Time (t) × Area (A)

According to the question

$\bigstar{Solar \: energy(E) \: = \: Solar \: constant (S) \: × \: Time(t) \: × \: Area(A)} \\ \\ \bigstar{e=1.4×103×5×10} \\ \\ \bigstar{e=7×104J}</p><p></p><p></p><p></p><p>$

Hence, solar energy = 7 × 104 J