MCQ
Correct mathematical form of Ampere's rule is:
  • A
    $\oint B \cdot d l=\Sigma i$
  • $\oint H \cdot d l=\Sigma i$
  • C
    $\oint B d l=\frac{\Sigma i}{\mu_{ o }}$
  • D
    $\oint H d l=\mu_{ o } \Sigma i$

Answer

Correct option: B.
$\oint H \cdot d l=\Sigma i$
(b)$\oint H \cdot d l=\Sigma i$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The sodium nucleus   contains

(a) 11 electrons

(b) 12 protons

(c) 23 protons

(d) 12 neutrons

Blue colour of sky is due to:

In Young’s experiment, the distance between slits is 0.28 mm and distance between slits and screen is 1.4 m. Distance between central bright fringe and third bright fringe is 0.9 cm. What is the wavelength of used light

(a) 5000 Å

(b) 6000 Å

(c) 7000 Å

(d) 9000 Å

A charged particle is moving in a uniform magnetic field in a circular path. Radius of circular path is R. When energy of particle is doubled, then new radius will be

(a) R   

(b)  

(c) 2 R      

(d) 3 R

Conservation of electric charges means that the total charge of an isolated system remains ____ with time.

Which of the following is not a correct statement

(a) Resistivity of electrolytes decreases on increasing temperature

(b) Resistance of mercury falls on decreasing its temperature

(c) When joined in series a 40 W bulb glows more than a 60 W bulb

(d) Resistance of 40 W bulb is less than the resistance of 60 W bulb

For non-conductors, the energy gap is

(a) 6 eV  

(b) 1.1 eV

(c) 0.8 eV 

(d) 0.3 eV

Field inside a solenoid is

(a) Directly proportional to its length

(b) Directly proportional to current

(c) Inversely proportional to total number of turns

(d) Inversely proportional to current

A thin equiconvex lens is made of glass of refractive index 1.5 and its focal length is 0.2 m, if it acts as a concave lens of 0.5 m focal length when dipped in a liquid, the refractive index of the liquid is

(a)  

(b)  

(c)  

(d)  

Switch S of the circuit shown in figure. is closed at t = 0. If e denotes the induced

emf in L and i, the current flowing through the circuit at time t, which of the following graphs is correct

(a)

(b)

(c)

(d)