PHY101 Assigment # 2 2016

PHY101

Assignment 2: (Spring 2016)

PHYSICS (PHY101)

TOTAL MARKS: 25

Due Date: 04/07/2016

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Question # 1

Two particles having charges q₁ = 0.600 nC and q₂ = 7.00 nC are separated by a distance of 130 cm. At what point along the line connecting the two charges is the total electric field due to the two charges equal to zero?

Question # 2

The sum of the charges on both plates of a capacitor is zero. What does a capacitor store?

Ans: The total charge in a capacitor is always zero and in equilibrium with its surroundings. But capacitors do store electric energy. The energy is stored in an electric field. Voltage, when applied between two plates of a capacitor, creates a potential difference between its plates.

Question # 3

(a) A 20 dB sound is twice as intense as a 10 dB sound, explain it.

Ans:

L (db) =10log (l/lo)[lo=10^-12W/m^2]

The relation between two different sound levels is

L2 (db) =L1 (db) +10log (12/l1)

If l2=2l1

L2 (dB) =L1 (dB) + 10log2=L1+3dB

If intensity doubles the sound level increases of 3 dB

The above relation can be written as

l2 = l1 10^ [(L2-L1)/10]

If L2-L1=20-10=10dB

l2 = 10l1

if sound level increases of 10dB the intensity increases 10 times.

(b) The degree of Doppler shift experienced by a listener is independent of how far the listener is from a moving sound source. Is it true or wrong explain it?

Ans:

Essentially wrong. The distance and velocity (speed and direction) of the source all combine to give the wave length that arrives at the listener.

Question # 4

(a) What is Fourier analysis?

Ans:

The process of decomposing a musical instrument sound or any other periodic function into its constituent sine or cosine waves is Fourier analysis.

(b) What is principal of superposition?

Ans:

In physics and system theory, the superposition principle, also known as superposition property, states that, for all linear systems, the net responses at a given place and time caused by two or more stimuli is the sum of the responses which would have been caused by each stimulus individually.

cs302 Solved Quiz

estion # 1 of 10 ( Start time: 03:03:55 PM ) Total Marks: 1 Divide-by-32 counter can be acheived by using Select correct option: Flip-Flop and DIV 10 Flip-Flop and DIV 16 Flip-Flop and DIV 32 DIV 16 and DIV 32 Question # 2 of 10 ( Start time: 03:05:20 PM ) Total Marks: 1 The counter states or the range of numbers of a counter is determined by the formula. (“n” represents the total number of flip-flops) Select correct option: (n raise to power 2) (n raise to power 2 and then minus 1) (2 raise to power n) (2 raise to power n and then minus 1) Question # 3 of 10 ( Start time: 03:06:36 PM ) Total Marks: 1 A 4- bit UP/DOWN counter is in DOWN mode and in the 1010 state. on the next clock pulse, to what state does the counter go? Select correct option: 1001 1011 0011 1100 Question # 4 of 10 ( Start time: 03:07:37 PM ) Tot...

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PSY403 Assignmet NO 2

Second part of psy403 2nd assignment Determinants of attitudes Positive behave Positive personality Positive effect on others When I help my friend sister it is positive attitude When I start screaming and running it is negative attitude My friend help blind child it is positive attitude but if she don’t help that child that is negative attitude Determinants of subjective norms An individual's perception about the particular behavior, which is influenced by the judgment of significant others (e.g., parents, spouse, friends, teachers Help my friend sister is my own perception which was not pressured by society or others My friend help blind child that was her perception that child need help not do for others Determinants of perceived control When I help my sister friend I have full control over my self When friend help blind child she had full control over herself

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