MCQ
Which group among the following is insulator?
- ASilver, copper, gold
- BPaper, glass, cotton
- CThe human body, wood, iron
- DGlass, copper, paper
✓
Answer
- Paper, glass, cotton
Explanation:
Glass, paper, and cotton are good quality insulators. The rest options contain one or more conducting materials. Silver is the best conductor material available in nature. But it is costly, so it can’t be used in the electricity distribution system.
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
Which color band in the color coding of a resistor has the tolerance $\pm2\%$?
→A rocket is going away from the earth at a speed of 106 m/s If the wavelength of the light wave emitted by it be 5700 Å, what will be its Doppler's shift
|
(a) 200 Å |
(b) 19 Å |
(c) 20 Å |
(d) 0.2 Å |
A small coil of N turns has area A and a current I flows through it. The magnetic dipole moment of this coil will be
|
(a) NI/A |
(b) |
(c) |
(d) NIA |
The n-side of the depletion layer of a p-n junction.
An astronaut in a spaceship see the outer space as
|
(a) White |
(b) Black |
(c) Blue |
(d) Red |
When the convergent nature of a convex lens will be less as compared with air
|
(a) In water |
(b) In oil |
(c) In both (a) and (b) |
(d) None of these |
A liquid is contained in a vertical tube of semicircular cross-section The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in ratio: 
→-
$1:1$
-
$1:2$
-
$\pi:2$
-
$2:\pi$
A $15.0 \mu F$ capacitor is connected to a $220 V, 50$ Hz source, then the capacitive reactance is ___________ $\Omega$.
→Substances in which the magnetic moment of a single atom is not zero, is known as
|
(a) Diamagnetism |
(b) Ferromagnetism |
(c) Paramagnetism |
(d) Ferrimagnetism |
A battery of 6 volts is connected to the terminals of a three metre long wire of uniform thickness and resistance of the order of 100 Ω. The difference of potential between two points separated by 50 cm on the wire will be
|
(a) 1 V |
(b) 1.5 V |
(c) 2 V |
(d) 3 V |