Electric Circuits Answers

An aluminum wire with a diameter of 1.02 mm and volume of 1.57x10^-5 m³, has a battery attached to it with an emf of 30 volts. Find (a) the resistance of the wire and (b) the corresponding current.

A tesla car needs to charge its 350-volt model and must send about 715 amps through its cabling to the battery. What is the rate of electron flow through the cable for the current involved?

Three identical capacitors are connected with a resistor in two different circuits. When they are connected in series, the time constant to charge up this circuit is 0.02s. What is the time constant when they are connected as in parallel?

In series circuit, the voltmeter reads 120V. Find what is (a.) the combined resistance (b) the potential differences across the combination (c) the voltage across the 30ꭥ resistor and (d) the current flows through the 10ꭥ resistor?

A typical incandescent bulb has an efficiency of about 10%. What current is needed for a bulb with a resistance of 1.5×10^2 Ω to output power of 6.0 W?

An electric heater is to be made from a

nichrome wire. Nichrome has a Resistivity of 1.0*10^-6 ohm'sm

at the operating temperature of

the heater. The power of the heater is 60W

when the potential difference across its

terminals is 12V. Calculate the length of the

wire of diameter 0.30mn required for the

heater.

A current of 50.0A

50.0A flows through a cross-section of a wire. After six hours, what is the total mass of all of the electrons which have passed through the cross-section? Give your answer in milligrams (mg) and to three significant figures.

A hundred 1.0 ohm resistors are to be connected in a circuit. All resistors must be connected in the circuit such that current flows through them. What is the least equivalent resistance you could get in such a circuit? Give your answer in ohms to two significant figures

A typical incandescent bulb has an efficiency of about 10%. What current is needed for a bulb with a resistance of 1.5×102Ω to output power of 6.0 W?

A typical incandescent bulb has an efficiency of about 10%. What current is needed for a bulb with a resistance of (1.5×10^2) Ω  to output power of 6.0 W?