Electric Circuits Answers

Determine the power dissipated when a current of 10Ma flows through an appliance having a resistance of 8kΩ

Three resistors are connected in series with one another. When a supply of 100V is applied to the circuit, current of 0.75A flows in it. The potential difference across one resistor is found to be 18.85V and the power dissipated by the second is 2.8W. Determine the value of the remaining resistance.

Briefly describe how high speed charged particles are produced in a cyclotron

In a circular particle accelerator with a radius of 5.49m,protons are accelerated to 1.99 × 107m/s. Find the magnetic flux density B that’s required to keep the protons following the circular path of the accelerator mp =1.67 ×10-27kg and Qp =1.60 ×10-19J

The force needed to keep an object in circular motion is given by F= mv2/r. Combine this with F= BQv to find an expression for the magnetic flux density B needed to keep a charged particle in circular motion for a given radius r and orbital speed v.

Find the force that acts on a particle with acts on a particle with a charge of 3.2 ×10-19C travelling at a velocity of 5.5 ×103m/s perpendicular to a magnetic field with a flux density of 60mT

A circuit consisting of three ideal batteries with voltages E1, E2, and E3, and three ideal resistors with resistances R1, R2, and R3, is shown in the figure. Calculate the current Ip through point P. Let the sign of the current correspond to its direction, with "up" being positive. + Ej = 32.5 V, E2 = 21.0 V, E 3 = 34.5 V R1 = 5.20 k2, R2 = 19.5 k-2, R3 = 4.50 k12 co + Ip = MA

For practical operational amplifier circuits, the recommended value for the resistors in the circuit is in the 1 kohm – 100 kohm range so that the op-amp can be considered as ideal. Explain the reason for that.

For practical operational amplifier circuits, the recommended value for the resistors in the circuit is in the 1 kohm – 100 kohm range so that the op-amp can be considered as ideal. Explain the reason for that.

Yoon Ki investigates electromagnetic induction by moving a bar magnet into a coil of wire. His experimental setup is shown.

A coil or loop of wire is held horizontally and connected to a galvanometer measuring current. A hand holds a bar magnet and moves it into the coil.

What change would most improve his results?

moving the magnet faster
using more loops of wire in the coil
using the south pole of the magnet
connecting the galvanometer to the coil