- AComposition type resistor and film type resistor.
- BRheostat and film type resistor.
- CRheostat and variable resistor.
- DComposition type resistor and rheostat.
Explanation:
Carbon resistors are of two types composition type resistor and film type resistor.
There are a number of different types of fixed resistor:
Carbon composition: These types were once very common, but are now seldom used.
Carbon film: This resistor type is formed by "cracking" a hydrocarbon onto a ceramic former.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The refractive indices of water and glass with respect to air are 1.2 and 1.5 respectively. The refractive index of glass with respect to water is
|
(a) 0.6 |
(b) 0.8 |
(c) 1.25 |
(d) 1.75 |
The measurement of voltmeter in the following circuit is
|
(a) 2.4 V |
(b) 3.4 V |
(c) 4.0 V |
(d) 6.0 V |
Blue colour of sky is due to:
The image formed by a convex mirror of focal length 30 cm is a quarter of the size of the object. The distance of the object from the mirror is
|
(a) 30 cm |
(b) 90 cm |
(c) 120 cm |
(d) 60 cm |
In a potentiometer experiment two cells of e.m.f. E1 and E2 are used in series and in conjunction and the balancing length is found to be 58 cm of the wire. If the polarity of E2 is reversed, then the balancing length becomes 29 cm. The ratio of the e.m.f. of the two cells is
|
(a) 1 : 1 |
(b) 2 : 1 |
(c) 3 : 1 |
(d) 4 : 1 |