Question
Identify the material whose resistivity is more than $10^{14} \Omega$ m.
✓
Answer
Insulators are materials which do not conduct electric current, and thereby, offer high resistance to the flow of charges. Insulators like bakelite and hard rubber have very high resistivities in the range of $10^{14}$ to $10^{16} \Omega m.$
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
A current passes through a resistor. Let $K_1$ and $K_2$ represent the average kinetic energy of the conduction electrons and the metal ions, respectively :
→Assume you are sitting in sun for $2.5$ hours. The area of your body exposed normally to sun rays $1.3m^2.$ The intensity of sun rays is $\frac{1.1 \ \text{Kilowatt}}{\text{m}^2}$ If your body completely absorbs the sun rays then the momentum transferred to your body will be $($in $\ Kg - \frac{\text{m}}{\text{s}}):$
→The wavelength of $X-$rays is of the order of
→If the capacitors having capacitance $C_1$ and $C_2$ are connected in series then their resultant capacitance is given by:
→It two parallel wires carry current in opposite directions:
Ray optics is valid, when characteristic dimensions are(a) Of the same order as the wavelength of light(b) Much smaller than the wavelength of light(c) Of the order of one millimetre(d) Much larger than the wavelength of light
To obtain maximum EMF from a number of cells, they must be connected in.
A tuning fork of frequency 512Hz is vibrated with a sonometer wire and 6 beats per second are heard. The beat frequency reduces if the tension in the string is slightly increased. The original frequency of vibration of the string is:
-
506Hz
-
512Hz
-
518Hz
-
524Hz.
A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be
A proton and an $\alpha-$particle are accelerated through a potential difference of $100 V.$ The ratio of the wavelength associated with the proton to that associated with an $\alpha-$particle is
→