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Describe how the equipment can be used to find the power of another battery charger.
The equipment is: power supply, clock, battery charger, joulemeter and battery,
i ) Describe any 4 natural/ industrial processes of adiabatic compression and
adiabatic expansion.
ii ) State how entropy changes are linked with Air pollution in modern world.
iii ) Describe the difference between capacitor and a capacitance. Also state the basic relation between frequency and capacitance.
Expert's answer
A warning buzzer is to sound when the following conditions occurs a)A or B are up b)A,C and D are up c) B,C and D are up d)B or D are up
- The circuit shown in Figure 28.5 is constructed using a 6 V battery, a 3 kΩ resistor, and a 6 kΩ resistor. Initially, both switches are open and the capacitor is uncharged.
Switch A is closed and the capacitor begins to charge.
(a) After 1 2 seconds the potential difference across the capacitor is 3.78 V. What is the capacitance of the capacitor?
After several minutes switch A is opened.
(b) What is the approximate potential difference across the capacitor?
Switch B is now closed and the capacitor begins to discharge.
(c) What is the characteristic time for discharging this capacitor?
(d) What will the current through the 6 kΩ resistor be after 2 seconds?
(e) What will the charge on the capacitor be after 3 seconds?
- An 18 µF capacitor has been charged to 100 V. A 15 kΩ resistor and a 5 kΩ resistor, are connected in series with the capacitor.
(a) What is the time constant of this circuit?
(b) Approximately how long (in terms of τ) will it take for the charge stored on the resistor to drop to 0.1% of its original charge?
Once the capacitor is fully discharged the 5 kΩ resistor is removed and replaced with a 12 V battery.
(c) What is the time constant of the circuit now?
(d) Approximately how long will it take for the charge stored on the resistor to rise to 95% of its maximum charge (in terms of τ)?
The circuit in the Figure 1 below has been connected for several
seconds. Find the current;
3.1. in the 4.00-V battery,
3.2. in the 3.00-V resistor,
3.3. in the 8.00-V battery, and
3.4. in the 3.00-V battery.
3.5. Find the charge on the cap
By considering the principles that the distribution of current in a circuit is the result of charge conservation, and the distribution of potential differences in a circuit is the result of energy conservation, derive:
(a) the combined resistance of two resistors R1 and R2 connected in series
(b) the combined resistance of two resistors R1 and R2 connected in parallel
A wire 4.00 m long and 6.00 mm in diameter has a resistance of 15.0 mΩ.
A potential difference of 23.0 V is applied between the ends.
2.1. What is the current in the wire?
2.2. What is the magnitude of the current density?
2.3. Calculate the resistivity of the wire material.
2.4. Using the resistivity constants table, identify the
a circuit in which a capacitor of capacitance 4700microfarad is to be connected across a potential difference of 9v.He has 4700microfarad 6v capacitor available. draw the diagram to show how the 4 capacitor could be used for this purpose
i ) Describe any 4 natural/ industrial processes of adiabatic compression and
adiabatic expansion.
ii ) State how entropy changes are linked with Air pollution in modern world.
iii ) Describe the difference between capacitor and a capacitance. Also state the basic relation between frequency and capacitance.
