MIDTERM 3 SECTION -NAME, 4. Following graph shows the phase of current and poten

Question

MIDTERM 3 SECTION -NAME, 4. Following graph shows the phase of current and potential of a capacitor i n AC circuit. At point a, it is given that current flows upward direction andit capacitor has a charge of zero. Choose among 'A-D what in the graph. happens at point 'b At point a, a trne B. 5. Which of the following statement is true? A. X-ray has longer wavelength than visible light. B. Gamma ray has greater frequency than Radio waves C. The E and B fields in electromagnetic waves are oriented parallel to the wave's direction of travel, and also to each other. All electromagnetic waves travel through a vacuum at the speeds that are proportional to their wavelength. None of the above. D. E.

Explanation / Answer

Question No5 Explanation

1.initial voltage zero it increse minute across capacitoras shown in (a)

2.this voltage is not opposed by capacitor act as a short circuit current is high

3. minute increase oppose by capacitor because it is charged hence as voltage across it capacitor increses it reduces the intial without opposed curren

4.as voltage increse current reduce hence at peak voltage across capacitor oppose fully applied voltage and hence current is zero  

5 direction of charge of capacitor determined by flow of electron in that duration which is opposite of current flow hence lower plate is positive charge and upper one is negative charge

Answer Part D

Question no 6)

Gamma ray have greatest frequency and radio wave have lowest frequecy

Answer is Part B

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