MCQ
Which of the following is not a correct statement
  • A
    Resistivity of electrolytes decreases on increasing temperature
  • B
    Resistance of mercury falls on decreasing its temperature
  • C
    When joined in series a $40\, W$ bulb glows more than a $60\, W$ bulb
  • Resistance of $40\, W$ bulb is less than the resistance of $60\, W$ bulb

Answer

Correct option: D.
Resistance of $40\, W$ bulb is less than the resistance of $60\, W$ bulb
d
(d) The resistance of $40\, W$ bulb will be more and $60\, W$ bulb will be less.

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

If the balance point is obtained at the $35^{th} cm$ in a meter bridge the resistances in the left and right gaps are in the ratio of
An empty thick conducting shell of inner radius $a$ and outer radius $b$ is shown in figure.If it is observed that the inner face of the shell carries a uniform charge density $-\sigma$ and the surface carries a uniform charge density $ '\sigma '$

If the charge $q_A$ is slowly moved inside the shell, then choose the statement$(s)$

$A$ long metal bar of $30\,cm$ length is aligned along a north south line and moves eastward at a speed of $10\, ms^{-1}$. $A$ uniform magnetic field of $4.0\,T$ points vertically downwards. If the south end of the bar has a potential of $0\,V$, the induced potential at the north end of the bar is.....$V$
From a disc of radius $R$ and mass $M,$ a circular hole of diameter $R,$ whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?
A particle $P$ moving with speed $v$  undergoes a head -on elastic collision with another particle $Q$ of identical mass but at rest. After the collision
In the double slit experiment when a glass plate (refractive index $1.5$) of thickness $t$ is introduced in the path of one of the interfering beams (wavelength $\lambda $), intensity at the position where the central maximum occurred previously remains unchanged. Minimum thickness of the glass plate is
Three particles, located initially on the vertices of an equilateral triangle of side $L,$ start moving with a constant tangential acceleration towards each other in a cyclic manner, forming spiral loci that coverage at the centroid of the triangle. The length of one such spiral locus will be
In which case does the potential energy decrease
At a certain place, the horizontal component of earth's magnetic field is $\sqrt 3 $times the vertical component. The angle of dip at that place is....$^o$
Velocity-time curve for a body projected vertically upwards is