Q1PhysicsUnit 13: Magnetic Effects of Current and Magnetism
The direction of magnetic lines of forces close to a straight conductor carrying current will be -
Physics · JEE
Ampere's law and its applications to infinitely long current carrying straight wire and solenoid Short Tricks for JEE
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Quick answer
Short tricks for Ampere's law and its applications to infinitely long current carrying straight wire and solenoid work only with strong fundamentals. Apply the tips below in timed sets and review every explanation.
Use these Ampere's law and its applications to infinitely long current carrying straight wire and solenoid shortcuts to save time in JEE Physics papers — then validate speed with 7+ MCQs on Goodmarks.
Short tricks for speed
Ampere's law and its applications to infinitely long current carrying straight wire and solenoid focus drill
Solve 15 mixed MCQs for Ampere's law and its applications to infinitely long current carrying straight wire and solenoid, review every explanation, and note formulas you hesitated on.
Dimensional check first
Before solving, verify each term has consistent SI dimensions — eliminates wrong options quickly in JEE MCQs.
Limiting cases
Substitute extreme values (t→0, m→∞, θ→0) to sanity-check your final expression.
Syllabus context
Part of Magnetic Effects of Current and Magnetism in JEE Main Physics.
- Biot Savart law and its application to the current carrying circular loop
- Ampere's law and its applications to infinitely long current carrying straight wire and solenoid
- Force on a moving charge in uniform magnetic and electric fields
- Force on a current-carrying conductor in a uniform magnetic field
- The force between two parallel currents carrying conductors-definition of ampere
- Torque experienced by a current loop in a uniform magnetic field: Moving coil galvanometer, its sensitivity and conversion to ammeter and voltmeter
- Current loop as a magnetic dipole and its magnetic dipole moment, bar magnet as an equivalent solenoid, magnetic field lines
- Magnetic field due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis, torque on a magnetic dipole in a uniform magnetic field
- Para-, dia- and ferromagnetic substances with examples, the effect of temperature on magnetic properties
Free sample questions
Attempt 7 free MCQs for Ampere's law and its applications to infinitely long current carrying straight wire and solenoid. Unlock the full bank with Pro.
Q2PhysicsUnit 13: Magnetic Effects of Current and Magnetism
A long coil containing a large number of close turns of insulated copper wire.
Q3PhysicsUnit 13: Magnetic Effects of Current and Magnetism
A long solenoid has magnetic field strength of inside it
when a current of passes through it The number of turns in 1 m of the
solenoid is
Q4PhysicsUnit 13: Magnetic Effects of Current and Magnetism
A straight wire lying in a horizontal plane carries a current from north to
south. What will be the direction of
magnetic field at a point just underneath it?
Q5PhysicsUnit 13: Magnetic Effects of Current and Magnetism
Assertion
If the current in a solenoid is reversed in
direction while keeping the same magnitude, the magnetic field energy stored in the solenoid decreases.
Reason
Magnetic field energy density is proportional to square of current
Q6PhysicsUnit 13: Magnetic Effects of Current and Magnetism
A solenoid is long and its inner
diameter is . It has 3 layers of
winding's of 1000 turns each and carries a current of 2.0 amperes.The magnetic flux for a cross-section of the solenoid is nearly.
Q7PhysicsUnit 13: Magnetic Effects of Current and Magnetism
The magnetic field generated along the axis of a solenoid is proportional to:
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