**Ampere’s law MCQs**

Ampere’s circuital law:-

**Applications of Ampere’s law:**

- Magnetic induction at a point due to straight conductor carrying current can be finding using the formula,

- Magnetic induction along axis of long straight current carrying solenoid can be finding using formula,

**B =μ _{0} nI**

Where n=N/L= number of turns per unit length

3. Magnetic induction along axis carrying toroid can be finding using formula,

**B =μ _{0} nI**

Where n=N/2πr= number of turns per unit length

**Q.1) Ampere’s law is the modification of……**

a) Kirchhoff’s law

b) Laplace’s law

c) Biot-Savert’s law

d) Faraday’s law

**Q.2) Ampere’s circuital law can be used for finding….**

a) magnetic field induction due straight conductor.

b)electric field induction due to point charge

c) magnetic field along axis of bar magnet

d) all of these.

**Q.3) According to Ampere’s law the angle between length element of magnetic field and the direction of magnetic field is always….**

a) 180^{0}

b) 360^{0}

c) 90^{0}

d) 0^{0}

**Q.4) The magnitude of magnetic induction due to straight conductor carrying current of 10 A at distance of 25 cm is…….**

**Q.5) Solenoid of length 15 cm has 15000 turns carries current of 2 A, the magnitude of magnetic induction along its axis is….**

**Q.6) Solenoid of length 15 cm has 15000 turns carries current of 2 A, the magnitude of magnetic induction at its end is….**

**Q.7)The imaginary loop selected while applying Ampere’s law to find magnetic induction in that loop is termed as….**

a) Close loop

b) Loop element

c) Amperian loop

d) Amperian line

**Q.8) Toroidal coil of average radius 25 cm and 1000 turns carries current of 5 A, the magnitude of magnetic induction at centre of toroid is….**

**Answers:**

Q.1) c) Biot-Savert’s law

Q.2) a) magnetic field induction due straight conductor.

Q.3) d) 0^{0}