Which of the following law is used to determine the direction of the induced current in a loop of wire placed in a changing magnetic field?(1 Point)Ampere's lawGauss’s lawFaraday’s lawLenz’s law

In this problem, you will use Lenz's law to explore what happens when an electromagnet is activated a short distance from a wire loop. Note, an electromagnet is a solenoid with a magnetic material inside its core. In this case, the magnetic material is iron, whose magnetic polarization amplifies the external magnetic field produced by the solenoid.You will need to use the right-hand rule to find the direction of the induced current.

Imagine a current carrying circular loop ofwire on the plane of your answer sheet. Themagnetic field inside the loop is into the planeof the paper.(i) What must be the direction of the currentin the loop?

The loop in the image is moving through the magnetic field, of strength 0.700 T, at a speed of 27.0 m/s. If the resistance in the loop is 1.10 Ω and the width of the wire is x = 9.00 cm, what is the magnitude and direction of the induced current?

. What is the direction of the magnetic field produced by a current loop?(A) Parallel to the plane of the loop(B) Perpendicular to the plane of the loop(C) In the direction of the current flow(D) Opposite to the direction of the current flow

Which of the following can be used to determine the direction of the magnetic field around a straight current-carrying wire?The right-hand grip ruleFleming’s right-hand ruleThe left-hand grip ruleFleming’s left-hand rule2In Fleming’s left-hand rule, what does the first (index) finger represent?The (conventional) current directionThe electric field directionThe direction of the force which is exerted on the conductorThe magnetic field direction3An electromagnet can be produced by passing an electric current through a solenoid.  Which of the following will NOT increase the strength of the magnetic field around such a solenoid?Increasing the current through the solenoidPlacing a soft iron core into the middle of the solenoidMoving the turns of wire that make up the solenoid further apartUsing more turns of wire in the solenoid4Which of the following will NOT increase the size of the force which is exerted on a current-carrying conductor in a magnetic field?Increasing the magnetic flux density of the magnetic fieldIncreasing the current which is flowing through the conductorIncreasing the amount of time which the conductor spends in the magnetic fieldIncreasing the length of the conductor which is in the magnetic field5What is the unit for the magnetic flux density of a magnetic field?TeslaBarNewtons per ampMagnetons6Which of the following will NOT increase the speed at which a d.c. (direct current) electric motor rotates?Swapping around the electrical connections to the battery which powers the motorReplacing the wire which forms the coil with a type of wire which has a lower electrical resistanceLubricating the moving parts of the motorIncreasing the strength of the magnet inside the motor7A 2 cm-long piece of wire is placed at right angles to a magnetic field which has a magnetic flux density of 10 mT.  Calculate the force which will be exerted on the wire when a current of 1 A flows through it.20 N2 × 10-4 N0.02 N0.2 N