Physics Answers

A 330-ohm resistor is connected to a 5-volt battery. The current through the resistor is?

Two circuits present the same resistance to the current. In one circuit the battery causing the flow of current has a voltage of 9.0 V, and the current is 3.0 A. In the other circuit the battery has a voltage of 1.5 V. What is the current in this other circuit?

A lightning bolt delivers a charge of 35 C to the ground in a time of 1.0*10^-3 s. What is the current?

In 2.0 s, 1.9*10¹⁹ electrons pass a certain point in a wire. what it the current / in the wire?

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?

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?

The radio tuning capacitor consists of 26 plates of area 24 cm^2. The distance between plates when set for maximum capacitance is 2mm.

Assuming that the area of projection at maximum capacity is equal to the area of the plates, find the maximum capacity of this condenser.

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?

A person weighs 837.72 newtons when she is on earth but only weigh 474.01 newtons when she is at the surface of another planet. What is the acceleration due to gravity on the planet?

A 450 kg satellite was launched by a popular TV station to orbit Earth.

How far should it be from the Earth’s surface to experience 4.25 x 103 N

of gravitational force?