MCQ
The current inside a copper voltameter [Roorkee 1992]
  • A
    Is half the outside value
  • Is the same as the outside value
  • C
    Is twice the outside value
  • D
    Depends on the concentration of $CuSO _4$

Answer

Correct option: B.
Is the same as the outside value
(b) The current through the voltameter is same as drawn from the battery outside it.

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 magnetic needle is made to vibrate in uniform field $H$, then its time period is $T$. If it vibrates in the field of intensity $4 H$, its time period will be
A person feels $2.5\%$ difference of frequency of a motor-car horn. If the motor-car is moving to the person and the velocity of sound is $320 \mathrm{~m} / \mathrm{sec}$, then the velocity of car will be
The coil in a moving coil galvanometer experiences torque proportional to current passes through it. If a steady current $i$ is passed through it the steady deflection of the coil is found to be $90^o$ . Now the steady current is switched off and a charge $q$ is suddenly passed through coil. If the coil has $N$ turns of area $A$ and its moment of inertia is $I$ about the axis it is going to rotate then the maximum angle through which it deflects upon passing charge $q$ is
In a compound microscope magnification will be large, if the focal length of the eye piece is
A particle $P$ is sliding down a frictionless hemispherical bowl. It passes the point $A$ at $t=0$. At this instant of time, the horizontal component of its velocity is $v$. A bead $Q$ of the same mass as $P$ is ejected from $A$ at $t=0$ along the horizontal string $A B$ $($see figure$)$ with the speed $v$. Friction between the bead and the string may be neglected. Let $t_P$ and $t_Q$ be the respective time taken by $P$ and $Q$ to reach the point $B$. 
When an ideal monoatomic gas is heated at constant pressure, fraction of heat energy supplied which increases the internal energy of gas, is
An adiabatic process occurs at constant
Coatings used on raincoat are waterproof because
In a wave motion $y=a \sin (k x-\omega t), y$ can represent
In the circuit shown below, what will be the readings of the voltmeter and ammeter
Image