The best conductor of electricity is :


A) filtered hot water

B) distilled water

C) filtered water at room temperature

D) salt water

Correct Answer:
D) salt water


Part of solved Physics questions and answers : >> General Science >> Physics








Comments

No comments available




Similar Questions
1). Which of the following is the correct sequence of the regions of the sun as one moves from its core to the surface?
1. Photosphere
2. Chromosphere
3. Convection zone
4. Corona
A). 3, 1, 2, 4
B). 1, 3, 4, 2
C). 2, 3, 4, 1
D). 2, 1, 3, 4
-- View Answer
2). You are standing in a lift. The force on the floor of the lift due to your weight will:
A). become zero when the lift moves up with an acceleration of 9.8 m/s2
B). become zero when the lift moves down with an acceleration of 9.8 m/s2
C). become zero when the lift moves with an acceleration of 9.8 m/s2 in any
direction
D). remain unchanged whatever be the value of acceleration of the lift
-- View Answer
3). If earth were 3 times as far from the sun as it is now, how would the gravitational attraction compare with its present value?
A). The gravitational attraction would be 9 times its present amount
B). The gravitational attraction would be double its present amount
C). The gravitational attraction would be 1/9 of its present amount
D). None of the above would be true
-- View Answer
4). Two cars, passing each other at high speed, are in danger of side swiping because :
A). of the increase in air pressure in the space between them
B). of decrease in the velocity of air molecules between them
C). of decrease in air pressure in the space between them
D). increase in the velocity of air molecules between them
-- View Answer
5). What is the correct ascending order for frequencies of the following
radiations?
1. Visible 2. X-rays 3. Ultraviolet 4. Radio Waves
A). 1, 3,, 2, 4
B). 3, 2, 4, 1
C). 4, 1, 3, 2
D). 4, 3, 1, 2
-- View Answer


6). Nuclear fission is caused by the impact of :
A). proton
B). electron
C). neutron
D). none of these
-- View Answer
7). Which of the following is used as a coolant in nuclear reactors?
A). water
B). Cadmium
C). Liquid sodium
D). Graphite
-- View Answer
8). Which of the following is good nuclear fuel?
A). Uranium-238
B). Neptunium-239
C). Thorium-236
D). Plutonium-239
-- View Answer
9). What is the wavelength of visible spectrum?
A). 1300-3000 A
B). 3900-7600 A
C). 7800-8000 A
D). 8500-9800 A
-- View Answer
10). In an atomic explosion, enormous energy is released which is due to the :
A). conversion of neutrons into protons
B). conversion of chemical energy into heat energy
C). conversion of chemical energy into nuclear energy
D). conversion of mass into energy
-- View Answer