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Standard XII

Physics

The Experimental Setup

The poynting ...

Question

The poynting vector for an electromagnetic wave is :

\to S = \to E \times \to H

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\to S = \to E \times \to B

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\to S = (\to E \times \to H) / 2

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\to S = (\to E \times \to B) / 2

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Solution

The correct option is A $\to S = \to E \times \to H$
Poynting vector is defined as $\to S = \to E \times \to H$ .
It represents the directional energy flux density(rate of energy flux per unit area) of an electromagnetic field.

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Similar questions

Q. The standard reduction potentials at 298 K for the following half reactions are given,

Z n_{(a q)}^{2 +} + 2 e^{-} ⇌ Z n_{(s)}

E^{\circ}

- 0.762 V

C r_{(a q)}^{3 +} + 3 e^{-} ⇌ C r_{(s)}

E^{\circ}

- 0.740 V

2 H_{(a q)}^{+} + 2 e^{-} ⇌ H_{2 (g)}

E^{\circ}

0.000 V

F e_{(a q)}^{3 +} + e^{-} ⇌ F e_{(s)}^{2 +}

E^{\circ}

0.770 V

Which is the strongest reducing agent?

Q. Poynting vectors

\to S

is defined as

\to S = \frac{1}{μ_{0}} \to E \times \to B

. The average value of

\to S

over a single period T is given by

Q. The standard reduction potential at 298 K for the following half cell reaction

Z n_{(a q)}^{2 +} + 2 e \to Z n_{(s)} E^{\circ} = - 0.762 V

C r_{(a q)}^{3 +} + 3 e \to C r_{(s)} E^{\circ} = 0.740 V

2 H_{(a q)}^{+} + 2 e \to H_{2 (g)} E^{\circ} = 0.0 V

F_{2 (g)} + 2 e \to 2 F_{(a q)}^{-} E^{\circ} = 2.87 V

Which of the following is the strongest reducing agent?

For the process $H_{2} O (l) (1 b a r, 373 K) \to H_{2} O (g) (1 b a r, 373 K)$ , the correct set of thermodynamic parameters is

The standard reduction potentials at 298 K for the following half reactions are given:

Which is the strongest reducing agent?
$Z n^{2 +} (a q .) + 2 e ⇌ Z n (s); - 0.762$
$C r^{3 +} (a q) + 3 e ⇌ C r (s); - 0.740$
$2 H^{+} (a q) + 2 e ⇌ H_{2} (g); 0.00$
$F e^{3 +} (a q) + e ⇌ F e^{2 +} (a q); 0.770$

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The poynting vector for an electromagnetic wave is :

The correct option is A →S=→E×→HPoynting vector is defined as →S=→E×→H.It represents the directional energy flux density(rate of energy flux per unit area) of an electromagnetic field.

The correct option is A $\to S = \to E \times \to H$
Poynting vector is defined as $\to S = \to E \times \to H$ .
It represents the directional energy flux density(rate of energy flux per unit area) of an electromagnetic field.