Light waves are
electro-mechanical waves
electro-magnetic waves
electro-optical waves
magneto-optical waves
A sample of carbon dioxide that undergoes a transformation from solid to liquid and then to gas would undergo
a change in mass
a change in density
a change in composition
no change in physical properties
B.
a change in density
We know that,
Density =
Change in state of a substance doesn't alter mass, composition or physical properties but it involves change in volume which results in change in density.
Which one of the following pairs of power projects is not correctly matched?
Papanasam - Hydropower
Neyveli - Hydropower
Ukai - Thermal power
Rana Pratap Sagar - Hydropower
A particle is moving in a circular path of radius r at a constant speed v. Which one of the following graphs correctly represents its acceleration a?
Which of the following element combinations will form ionic compounds?
Select the correct answer using the code given below.
2 only
3 only
2 and 3 only
1, 2 and 3
A thermodynamic process where no heat is exchanged with the surroundings is
isothermal
adiabatic
isobaric
isotropic
A compound X2O3 contains 31.58% oxygen by weight. The atomic mass of X is
34.66 g mo1-1
45.01 g mo1-1
52.00 g mo1-1
104.00 g mo1-1
Which one of the following is the correct sequence of oil refineries in India in respect of their time of establishment (starting from the earliest)?
Barauni - Haldia - Guwahati - Mathura
Barauni - Mathura - Guwahati - Haldia
Guwahati - Haldia - Mathura - Barauni
Guwahati - Barauni - Haldia - Mathura
Which one of the following circuit elements active component?
Resistor
Transistor
Inductor
Capacitor