Question
Which of the following is vector quantity(a) Current density(b) Current(c) Wattless current(d) Power
✓
Answer
(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.
Explore more
Similar questions
One conducting U tube can slide inside another as shown in figure, maintaining electric contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant speed v, then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be
In which of the following is the interference due to the division of wave front (a) Young's double slit experiment(b) Fresnel's biprism experiment(c) Lloyd's mirror experiment (d) Demonstration colours of thin film
In an electrolyte $3.2 \times 10^{18}$ bivalent positive ions drift to the right per second while $3.6 \times 10^{18}$ monovalent negative ions drift to the left per second. Then the current is
→The stopping potential $(V_0)$ versus frequency $(n)$ plot of a substance is shown in figure the threshold wave length is
→The limit of resolution of eye is approximately:
The target used in a Coolidge tube for the production of X-rays is made up of ________ .
Electromagentic waves were produced in laboratory first by:
Three capacitors of capacitances $6\mu\text{F}$ each are available. The minimum and maximum capacitances, which may be obtained are:
→- $6\mu\text{F},\ 18\mu\text{F}$
- $3\mu\text{F},\ 12\mu\text{F}$
- $2\mu\text{F},\ 12\mu\text{F}$
- $2\mu\text{F},\ 18\mu\text{F}$
For a real object, which of the following can produced a real image (a) Plane mirror(b) Concave lens(c) Convex mirror(d) Concave mirror
The muscles of a normal eye are least strained when the eye is focused on an object: