Question: If the current in a solenoid is doubled, what happens to the magnetic field inside the solenoid?
Options:
It doubles
It halves
It remains the same
It quadruples
Correct Answer: It doubles
Solution:
The magnetic field inside a solenoid is directly proportional to the current.
If the current in a solenoid is doubled, what happens to the magnetic field insi
Practice Questions
Q1
If the current in a solenoid is doubled, what happens to the magnetic field inside the solenoid?
It doubles
It halves
It remains the same
It quadruples
Questions & Step-by-Step Solutions
If the current in a solenoid is doubled, what happens to the magnetic field inside the solenoid?
Step 1: Understand what a solenoid is. A solenoid is a coil of wire that creates a magnetic field when an electric current passes through it.
Step 2: Know that the magnetic field inside a solenoid depends on the amount of current flowing through it.
Step 3: Remember the relationship: the magnetic field (B) inside a solenoid is directly proportional to the current (I). This means if you increase the current, the magnetic field increases.
Step 4: If the current is doubled (for example, from 1 ampere to 2 amperes), the magnetic field will also double.
Step 5: Conclude that if the current in a solenoid is doubled, the magnetic field inside the solenoid also doubles.
Magnetic Field in a Solenoid – The magnetic field inside a solenoid is directly proportional to the current flowing through it, as described by the formula B = μ₀(nI), where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current.
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