41) What is the conductivity of super conductor?
Infinite
42) What is the resistance of an ideal voltmeter?
Infinite
43) Magnetic Keeper are the pieces of?
Soft Iron
44) Not Gate can be operated by?
Single transistor
45) The metal used in wires at domestic Level: Copper
46) During electro refining, Pure Metal is collected at?
Cathode
47) A Conducting wire is?
Neutral
48) The process of connecting of wires is called: Combination
49) In the resistance Colour code, the fourth band signifies: Tolerance level
50) Water should not be used to extinguish fire caused by Electricity, because?
It may cause electrocution
51) Which alloy ia used for making permanent magnet?
Alnico
52) Which electromagnetic radiation is most prevalent in the atmosphere?
Infrared
53) Which instrument meant for measuring the rate of respiration?
Respirometer
54) How are the temperatures in equatorial regions between July and January?
The same
55) By which can Foetus development in woman’s womb be ascertained?
By Ultrasound
56) Medicines are more effective, if they are used in which state?
Colloidal state
57) Kirchhoff’s voltage law is based on the law of conservation of which thing?
Energy
58) A convex lens of glass has power P in air. If it is immersed in water, what will be its power?
Less than P
59) Which phenomena is used in optical fibres?
Total internal reflection
60) If the earth were to skin faster, how does acceleration due to gravity at the poles?
Remains the same