State the energy changes in the following cases while in use: - India Site

State the energy changes in the following cases while in use:

Class 10 | ICSE | Physics | Selina | Work Energy

State the energy changes in the following cases while in use:

(g)A solar cell

(h)Biogas burner

(i)An electric cell in a circuit

(g) Electrical energy is converted from light energy.

(h) Chemical energy is converted to thermal energy.

(i) Chemical energy is converted into electrical energy in the first step.

i

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(A) active mass
(B) molecular weight
(C) atomic weight
(D) equivalent weight

Formula of oleum is
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(B) $\mathrm{H}_{2} \mathrm{SO}_{4}$
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(D) $\mathrm{H}_{2} \mathrm{SO}_{5}$

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If the points $A(a, 0), B(0, b)$ and $C(1,1)$ are collinear, prove that $\frac{1}{a}+\frac{1}{b}=1$

If $A(-2,0), B(0,4)$ and $C(0, k)$ be three points such that area of a $A B C$ is 4 sq units, find the value of $k$.

Find the value of $k$ for which the area of a ABC having vertices $A(2,-6), B(5,4)$ and $C(k, 4)$ is 35 sq units.

Find the value of $k$ for which the points $A(1,-1), B(2, k)$ and $C(4,5)$ are collinear.

Find the value of $k$ for which the points $P(5,5), Q(k, 1)$ and $R(11,7)$ are collinear.

Find the value of $k$ for which the points $A(3,-2), B(k, 2)$ and $C(8,8)$ are collinear.

Use determinants to show that the following points are collinear. $P(-2,5), Q(-6,-7)$ and $R(-5,-4)$

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