Magnetic Balance: Force on a current carrying conductor

The circuit shown below is used to make a magnetic balance to weigh objects. The mass m to be measured is hung from the center of the bar that is in a uniform magnetic field of 1.50 T, directed towards the plane of the figure. The horizontal bar is 60 cm long. It is connected to the battery by thin vertical wires that can suppor ...continues

For and troque acting on a current carrying coil

3. A rectangular coil of wire, 22.0 cm by 35.0 cm and carrying a current 1.40 A, is oriented with the plane of its loop perpendicular to a uniform 1.50 T magnetic field as shown below. a) Calculate the net force and torque which the magnetic field exerts on the coil. b) The coil is rotated through a 30.0º angle about the axis ...continues

Torque and potential energy in a current carrying coil

4) A circular coil with area A and N turn is free to rotate about a diameter that coincides with the x-axis. Current I is circulating in the coil. There is a uniform magnetic field B in the positive y-direction. Calculate the magnitude and direction of torque and the value of the potential energy U, as given in the equation; "U ...continues

Energy and Momentum in EMW

3. Electromagnetic wave 1 has a maximum electric field of E0 = 33 V/m, and electromagnetic wave 2 has a maximum magnetic field of B0 = 3.3 µT. What is the intensity of wave 2? I've already solved for wave one, but I couldn't get wave 2. I got: 0.077, 8.67e-6, and 3.7e8, when I tried solving various ways, but I couldn't ge ...continues

Given an RL circuit, find the rms voltage and current.

7. An RL circuit consists of a resistor R = 63 ohms , an inductor, L = 45 mH, and an ac generator with a rms voltage of 120 V. (a) At what frequency will the rms current in this circuit be 1.5 A? (b) For this frequency, what is the rms voltage across the resistor, Vrms,R? (c) For this frequency, what ...continues

16 good questions on electromagnetism

(See attached file for full problem description with proper symbols and diagrams) --- 3.1 A long wire carries a current of 2 A along the +z axis. Calculate B in free space at (3,4,9). 3.2 Inside a long conductor of radius a, the magnetic field is H = 5 rho;/(2pi a2) a(phi) A/m. (a) Determine the current density J. (b) D ...continues

Electric potential

A +0.605 mC charge is 0.113 m from point x, a -0.398 mC charge is 0.174 m from point x, and a -0.211 mC charge is 0.251 m from point x. What is the electric potential at point x? What is the resistance of a device rated 30 watts @ 120 volts DC.

Capacitance & Voltage

Each capacitor in the following configuration is 6.00 mF. (Refer to attached picture file) What is the equivalent capacitance between points a and b? If a battery of voltage 35.0 volts is connected across points a and b, what voltage will appear across the capacitor identified with a star? If a battery of voltage 35.0 ...continues

Resistance

(Refer to attached picture file) Each resistor in the following circuit is 6.00 ohms. What is the equivalent resistance between points a and b? Find the equivalent resistance of the resistors between points a and b. Find the power dissipated by the resistor identified with a star.

Current

(Refer to attached picture) What is the current in the 10 ohm resistor? In measuring the voltage across the 10 ohm resistor, is point a positive or negative with respect to point b?