Physics Answers

A cylindrical rod has resistance R. If we triple its length and diameter, what is the resistance, in terms of R?

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.

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?

Capacitors of 2μF and 6μF are connected to a 100V battery. How much charge I supplied by the battery in charging the capacitors when (a) they are connected in series and (b) when they are connected in parallel?

Derive the single particle partition function for an ideal monatomic gas consisting of N identical particles occupying a volume V. Obtain expression for the entropy and pressure of this system.

A solenoid is 3 cm long and has a radius of 0.50 cm. The wire carries 2.0 A of current. The magnetic field at the center is A. 0.0419 T b. 0.099 T C. 0.0013 T D. 20 T

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?

24. Two 50 µF capacitor are connected in series. The equivalent capacitance of the combination is A. 25 µF B. 100 µF C. 50 µF D.200 µF 25. Two 50 µF capacitor are connected in parallel. The equivalent capacitance of the combination is A. 25 µF B. 100 µF C. 50 µF D. 200 µF