Electric Circuits Answers

Solve and Explain briefly:

An organic compound is known to be non-volatile and non-electrolyte. A 0.5-g sample is dissolved in water and diluted to 160 mL. The osmotic pressure is measured as 0.05 atm at 30°C. The approximate mass number for this compound is 1500 g/mol. From the data provided in this problem and knowing that the density of the solution is 1.00 g/mL. (a) Calculate the freezing point of the solutions. (b) Determine if the freezing point change would be a good way to determine the molecular mass of the compound. (c) Would the boiling point change be a better determining factor than the freezing point change?

When moving from infinity to towards a negative point chargem the electric potential

a. remains the same

b. undetermined

c. increases

d. decreases

Why do you say so? Explain.

Why r indicates the distance from the point charge to the point at which the potential energy is evaluated from the given equation: U = k Σ q_i / r²_i ?

A battery made up of 2cell joined in series supplies current to an external resistance of 5ohms.if the emf and internal resistance of each cell is o.6v and 6ohms respectively calculate the current flowing in the external resistor (b)calculate the terminal p.d. (d) calculate the lost voltage and construct a circuit

Calculate the energy stored in the capacitor network in the figure below when the capacitors are fully charged and when the capacitances are C1-12 0µF C2=2.0μF, and C3=4 0µF, respectively.

VT=12.0 V

6. a) You want to amplify an input signal with 10 mV amplitude and 50 MHz frequency. 

Which characteristics of op-amp will be significant in this case? What will be the 

value of these parameters? Why?

b) Design and draw a circuit using an op-amp to get + 8 V at output for input less than 

+4 V and -8 V at output for input greater than +4 V. 

A proton was released horizontally from a gun with an acceleration of 3.2 m/s2

to a point where the  distance is about 5.3 cm and stopped because of another proton was stationary positioned on its way. 

The distance of the two proton is 4.5 m. Compute for the electric field intensity 1cm to the left of  the stopped proton is positioned.

When the switch is open, the potential difference across the terminals of a battery is 200 V. When a current of 2.0 A flows, the potential difference across the battery drops to 16 V. (a) If this battery consists of two identical cells in series, what is the electromotive force of each cell? (b) If this battery consists of two identical cells in series, what is the internal resistance of each cell? (c) If this battery consists of two identical cells in parallel, what is the electromotive force of each cell? (d) If this battery consists of two identical cells in parallel, what is the internal resistance of each cell?

Calculate the amperage of a device with power 460w and voltage 230v

How much is the power of an appliances of 500hm resistance working with 200v supply