Download App

Current Electricity — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
MCQ
Which of the following is vector quantity
  • ✓
     Current density
  • B
     Current
  • C
     Wattless current
  • D
    Power
✓

Answer

Correct option: A.
 Current density
(a) Current density

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

Explore more

More "M.C.Q (1 Marks)" from Current Electricity→Current Electricity — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Identify the electromagnetic wave which is also known as heatwaves.
→
An electric dipole is placed at an angle of $30^o $ to a nonuniform electric field. The dipole will experience
→
In double slits experiment, for light of which colour the fringe width will be minimum
→
Match List$-I$ with List$-II$

  List$-I$   List$-II$
$(a)$ Phase difference between current and voltage in a purely resistive $AC$ circuit $(i)$ $\frac{\pi}{2} ;$ current leads voltage
$(b)$ Phase difference between current and voltage in a pure inductive $AC$ circuit $(ii)$ zero
$(c)$ Phase difference between current and voltage in a pure capacitive $AC$ circuit $(iii)$ $\frac{\pi}{2} ;$ current lags voltage
$(d)$ Phase difference between current and voltage in an $LCR$ series circuit $(iv)$ $\tan ^{-1}\left(\frac{X_{C}-X_{L}}{R}\right)$

Choose the most appropriate answer from the options given below:

→
The radius of curvature of the curved surface of a plano$-$convex lens is $20\ cm$. If the refractive index of the material of the lens be $1.5,$ it will.
→
If half life of radium is 77 days. Its decay constant in day will be
 
→
Two charges ${q_1}$ and ${q_2}$ are placed in vacuum at a distance $d$ and the force acting between them is $F$. If a medium of dielectric constant $4$ is introduced around them, the force now will be
→
The volume charge density of a sphere of radius $6 \,m$ is $2 \,\mu cm ^{-3}$. The number of lines of force per unit surface area coming out from the surface of the sphere is $....\times 10^{10}\, NC ^{-1}$.  [Given : Permittivity of vacuum  $\left.\in_{0}=8.85 \times 10^{-12} C ^{2} N ^{-1}- m ^{-2}\right]$
→
In $ac$ circuit when $ac$ ammeter is connected it reads $i$ current if a student uses $dc$ ammeter in place of $ac$ ammeter the reading in the $dc$ ammeter will be:
→
In Bohr's model, the atomic radius of the first orbit is $r_0$, then the radius of the third orbit is
→