Which of the following is TRUE about electromagnetism according to Michael Faraday?Group of answer choicesCurrent produces magnetic field.Wire carrying current produces magnetic fieldMagnetic field produces current.Current is always present in a magnetic field.
Question
Which of the following is TRUE about electromagnetism according to Michael Faraday?Group of answer choicesCurrent produces magnetic field.Wire carrying current produces magnetic fieldMagnetic field produces current.Current is always present in a magnetic field.
Solution
According to Michael Faraday's law of electromagnetic induction:
-
Current produces magnetic field: This is TRUE. When electric current flows through a wire, it generates a magnetic field around the wire.
-
Wire carrying current produces magnetic field: This is also TRUE. As stated above, a wire carrying an electric current will produce a magnetic field around it.
-
Magnetic field produces current: This is TRUE, but it needs clarification. A changing magnetic field can induce an electric current in a wire. This is the principle behind electromagnetic induction.
-
Current is always present in a magnetic field: This is FALSE. A magnetic field does not necessarily mean there is a current. A magnetic field can exist without a current, such as the magnetic field around a permanent magnet.
So, the first three statements are true according to Faraday's laws of electromagnetism, while the last statement is false.
Similar Questions
Which of these statements is true?Group of answer choicesElectric current is stored in batteries.Both are falseBoth are trueElectric current is a flow of electric charge.
Identify the two main relationships of electromagnetism. Electric currents produce magnetic fields around themMagnetic field lines show how electric currents flow around a magnetAll magnets have electric currents flowing through themMagnetic fields can produce electric currents when they move or change
the diagram below shows a current carrying wire placed inside a magnetic coil.State the difference it would make if the wire is replaced with a coil with more turns.Secondly the direction of current is reversed and the poles of the magnets are also reversed.Describe your answer in 25 to 35 words.B
Which of the following statements is correct?Statement 1: The region in the vicinity of a magnet, where magnetic materials can feel only the force of repulsion, is called a magnetic field.Statement 2: A magnetic field is generated around the conductor when an electric current passes through it.both the statement are incorrectStatement 1 and statement 2Statement 1Statement 2
Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also madean electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attractmore pins? Give reason.Question 8.Does the electric current have other effect except heating? Name it.Question 9.Explain the following.(a) Copper and aluminium wires are usually employed for electricity transmission. Explain thereason.(b) Explain how does the resistance of a wire vary with its length.(c) The tungsten is used almost exclusively for filament of electric lamp. Comment.www.n
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.