Heating element of an electric heater is made up of which metal?
A. Lead
B. Tungsten
C. Nichrome
D. None of these
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The largest gland in the human body is:
A. Heart
B. Kidney
C. Liver
D. None of these
Correct Answer: C
The Pineal gland is the smallest gland in the human body.
A. Light
B. Energy
C. Waves
D. None of these
Correct Answer: A
Objects that give out or emit light of their own are called as luminous objects . Sun, Bulb and candle emit their own light and hence, are luminous objects.
Alternative current (AC) is converted into direct current (DC) by using a:
A. Generator
B. Rectifier
C. Voltmeter
D. None of these
Correct Answer: B
Direct current (DC) is converted into alternating current (AC) by using a Inverter.
In the manufacture of Banaspati ghee, which gas is used?
A. Nitrogen
B. Hydrogen
C. Helium
D. None of these
Correct Answer: B . The gas used in the manufacture of Banaspati Ghee from Banaspati Oil is Hydrogen. At high pressure, in the presence of nickel catalyst, hydrogen is mixed with vegetable oils which turn them into vegetable ghee.
An ordinary mobile phone communicates by using:
A. Microwaves
B. Radio waves
C. Infrared waves
D. None of these
Correct Answer: B
The color which we see when our eyes are closed?
A. Eigengrau
B. Grey
C. Black
D. None of these
Correct Answer: A
The colour you see when you close your eyes is not black. It’s lighter than black and is called Eigengrau.