Question
For measurement of potential difference, potentiometer is preferred in comparison to voltmeter because(a) Potentiometer is more sensitive than voltmeter(b) The resistance of potentiometer is less than voltmeter(c) Potentiometer is cheaper than voltmeter(d) Potentiometer does not take current from the circuit
 
 
 
 

Answer

(d) Potentiometer does not take current from the circuit

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

In photoelectric effect, electrons are ejected from metals,if the incident light has a certain minimum?
The resistance of 1 A ammeter is 0.018 Ω . To convert it into 10 A ammeter, the shunt resistance required will be(a) 0.18 Ω(b) 0.0018 Ω(c) 0.002 Ω(d) 0.12 Ω
       
 A rod of length l rotates with a small but uniform angular velocity $\omega$ about its perpendicular bisector. A uniform magnetic field B exists parallel to the axis of rotation. The potential difference between the centre of the rod and an end is:
  1. $\text{zero}$
  2. $\frac{1}{8}\omega\text{Bl}^2$
  3. $\frac{1}{2}\omega\text{Bl}^2$
  4. $\text{B}\omega\text{l}^2$ 
The length of Milky way is (a) 100,000 light years(b) 10,000 light years(c) 1000 light years(d) 100 light years
       
Hydrogen atom excites energy level from fundamental state to n = 3. Number of spectral lines according to Bohr, is?
The ratio of the energies of the hydrogen atom in its first to second excited states is:
Curie temperature is the temperature above which:
The coil of area $0.1 \mathrm{~m}^2$ has $500$ turns. After placing the coil in a magnetic field of strength $4 \times 10^{-4} \mathrm{wb} / \mathrm{m}^2,$ it rotated through $90^{\circ}$ in $0.1 s ,$ the average $\text{emf}$ induced in the coil is
An alternating voltage $\text{E}=50\sqrt{2}\sin(100\text{t})$ V is connected to a $1\mu\text{F}$ capacitor through an ac ammeter. What will be the reading of the ammeter?
Light waves can be polarised because they: