MCQ
Select the correct statement
  • A
    Electric current is a vector quantity
  • B
    Resistivity of a conductor decreases with increase in temperature
  • Resistance is the opposition to the flow of current
  • D
    Current density is a scalar quantity

Answer

Correct option: C.
Resistance is the opposition to the flow of current
c
(c)

Resistance is the opposition to the flow of current

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 current $I$ flows through a uniform wire of diameter $d,$ when the mean drift velocity is $v_d.$ The same current will flow through a wire of diameter $d/2$ made of the same material, if the mean drift velocity of the electrons is
Five lumen/watt is the luminous efficiency of a lamp and its luminous intensity is 35 candela. The power of the lamp is
Three capacitors $2$ $\mu F$, $3$ $\mu F$ and $5$ $\mu F$ can withstand voltages to $3\,V, 2\,V$ and $1\,V$ respectively. Their series combination can withstand a maximum voltage equal to.....$Volts$ 
Three point charges $+q$, $-2q$ and $+q$ are placed at point $(x = 0,\,y = a,\,z = 0)$, $(x = 0,\,y = 0,\,z = 0)$ and $(x = a,\,y = 0,\,z = 0)$ respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are
A galvanometer has a resistance of $25\, ohm$ and a maximum of $0.01\, A$ current can be passed through it. In order to change it into an ammeter of range $10\, A$, the shunt resistance required is
$50\%$ of the $X-$ray coming from a Coolidge tube is able to pass through a $0.1\ mm$ thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of the aluminium foil that will allow $50\%$ of the $X-$ray to pass through will be:
A permanent magnet has the capacity to attract:
For a glass prism, the angle of minimum deviation will be smallest for the light of:
A positive charge is moving vertically upwards. When it enters a region of magnetic field directed towards north, what is the direction of the force on the charge?
The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation