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.
Explore more
Similar questions
The path executed by a charged particle whose motion is perpendicular to magnetic field i
|
(a) A straight line |
(b) An ellipse |
(c) A circle |
(d) A helix |
The measurement of an unknown resistance R is to be carried out using Wheatstones bridge (see Fig. of NCERT Book). Two students perform an experiment in two ways. The first students takes R2 = 10Ω and R1 = 5Ω. The other student takes R2 = 1000Ω and R1 = 500Ω. In the standard arm, both take R3 = 5Ω.
Both find $\text{R}=\frac{\text{R}_2}{\text{R}_1}\text{R}_3=10\Omega$ within errors.
→Both find $\text{R}=\frac{\text{R}_2}{\text{R}_1}\text{R}_3=10\Omega$ within errors.
Solid targets of different elements are bombarded by highly energetic electron beams. The frequency (f) of the characteristic X-rays emitted from different targets varies with atomic number Z as
|
(a) f ∝ |
(b) f ∝ |
(c) f ∝ Z |
(d) f ∝ |
A current passes through a wire of nonuniform crosssection.
Which of the following quantities are independent of the cross-section?
Which of the following quantities are independent of the cross-section?
Which of the following shown particle nature of light
|
(a) Refraction |
(b) Interference |
(c) Polarization |
(d) Photoelectric effect |
The wavelength of the most energetic X–ray emitted when a metal target is bombarded by 100 KeV electrons is approximately
| (a) 12 Å | (b) 4 Å |
(c) 0.31 Å |
(d) 0.124 Å |
A potentiometer can measure emf of a cell because:
The relation between Ip and Vp for a triode is 
, Keeping the grid potential constant at 1V, the value of rp will be
|
(a) 8 kW |
(b) 4 kW |
(c) 2 kW |
(d) 8 kW |
Which one of the following has the identical property for isotopes?
A radioactive nucleus emits a beta particle. The parent and daughter nuclei are
|
(a) Isotopes |
(b) Isotones |
(c) Isomers |
(d) Isobars |