Correct Answer : Nichrome
Nichrome: Most resistance wire heating elements usually use nichrome 80/20 (80% Nickel, 20% Chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.
Correct Answer : Cobalt
Vitamin B₁₂ is also referred to as cobalamin, because it contains a metal ion (cobalt). This makes it the largest and most complex vitamin of all.
Correct Answer : Stimulates HCI production
Correct Answer : Potassium
Correct Answer : Stimulated radiation
Laser is a device for producing stimulated radiation. LASER stands for light amplification by stimulated emission of (electromagnetic) radiation.
Correct Answer : The length of the pendulum increases
During summer, length of pendulum increases due to which the time period T increases and pendulum takes more time to complete one oscillation. Thus it becomes slow in summer.
Correct Answer : Crookes glass
Types of glass that can cut off ultraviolet rays are Crookes glass.
Correct Answer : enzymes
Correct Answer : small angle
The earth receives energy from the Sun in the form of radiation . The Earth reflects about 30% of the incoming solar radiation. In polar areas, solar radiation strikes earth at a low angle. The more acute the angle at which the sunlight strikes, the more atmosphere that sunlight must pass through.
Correct Answer : Continental shelf
Continental Shelf is a gentle seaward sloping surface extending from the coasts towards the open sea. In all, about 7.5% of the total area of the oceans is covered by the continental shelves.
