MCQ
Identify the dimensional formula of electric current.
  • A
    [M L T-2]
  • B
    [M0 L0 T0 A1]
  • C
    [M L3 T0]
  • D
    [M L2 T-3]

Answer

  1. [M0 L0 T0 A1]

Explanation:

The flow of charge per unit time is defined as current. The fundamental unit of current is Ampere (named after Andre Marie Ampere).

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

A light wave has a frequency of 4  Hz and a wavelength of 5  meters in a medium. The refractive index of the medium is

(a) 1.5

(b) 1.33

(c) 1.0

(d) 0.66

A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is:

A vertical wire kept in Z-X plane carries a current from Q to P (see figure). The magnetic field due to current will have the direction at the origin O along

(a) OX

(b)  

(c) OY

(d)  

The permanent magnetic moment of the atoms of a material is not zero. The material:
  1. Must be paramagnetic.
  2. Must be diamagnetic.
  3. Must be ferromagnetic.
  4. May be paramagnetic.

The field normal to the plane of a wire of n turns and radius r which carries a current i is measured on the axis of the coil at a small distance h from the centre of the coil. This is smaller than the field at the centre by the fraction

(a)  

(b)

(c)

(d)

A bar magnet of magnetic moment   is placed in a magnetic field of induction . The torque exerted on it is

(a)   

(b) - 

(c)  

(d)   

In the propagation of electromagnetic waves, the angle between the direction of propagation and plane of polarisation is

One cannot see through fog because .......... :

For copper-iron (Cu-Fe) couple, the thermo e.m.f. (temperature of cold junction = 0) is given by E = (14θ – 0.02)μV. The neutral temperature will be

(a) 350

(b) 350 K

(c) 560

(d) 560 K

According to Coulomb’s law, the coulomb force measured between two point charges is inversely proportional to: