Electric Circuits Answers

A parallel plate capacitor is composed of two rectangular plates with length 5mm and width 3 mm. The thickness of the insulating material is 0.5 mm. Find the permittivity of the insulating material if the capacitance is 2 μF

Reading from left to right, the colored bands on a resistor are violet(7), yellow (4), brown(1), and gold(±5%). If the resistor measures 704 with an ohmmeter, it is

An 18.0 V battery is connected to a circuit that has an ammeter (A1) a 5.50-ohm resistor connected in series with a voltmeter (V1) and 3 resistors connected in parallel R1, 2.0 ohms, R2, 2.0 ohms, and R3, 1.0 ohms. There is a voltmeter (V2) placed across the R1 and an ammeter (A2) in line with R2.  A. Draw the circuit diagram.  B. calculator the total resistance in the circuit.  C. calculate the values of the meters.

A 12.0-volt automobile battery is connected to an electric starter motor. The current through the motor is 210.0 amps. A. How many joules of energy does the battery deliver to the motor each second?  B. What power does the motor use in watts?  C. How much energy does the motor use in 10.0 seconds?

2.  You need to decrease the capacitance of a part of a circuit from 4600 pF to 2500 pF. For this process, you can add an additional capacitor to the circuit. How that additional capacitor must be connected and what capacitance it should have? Assume that no other existing circuit elements were removed.

Two objects, Object A and Object B, are rubbed together. Object B gains a positive charge after

the interaction. This means it must have gained protons from Object A.

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An initially uncharged  6.6 µC capacitor is in series with a 10 kΩ resistor as shown in the figure above.

Immediately after the switch is closed the current in the circuit is initially 10 mA. How long does it take the current in the circuit to drop to 0.5 mA? (to 2 s.f and in s)

A particle has charge -3 nC. A) Find the magnitude and direction of the electric field due to this particle at a point 0.25 m directly above it. B) At what distance from this particle does its electric field have a magnitude of 12 N/C?