Q. What type of magnetic behaviours is observed in a type I superconductor ?
1) perfect diamagnetism
2) perfect ferrimagnetism
3) perfect ferromagnetism
4) perfect paramagnetism
Q. Step-up transformers are used for-
1) increasing electrical power
2) decreasing electrical power
3) decreasing voltage
4) increasing voltage
Q. Which one of the following statements about energy is correct ?
1) Energy can be created as well as destroyed
2) Energy can be created but not destroyed
3) Energy can neither be created nor destroyed
4) Energy cannot be created but can be destroyed
Q. Which one among the following waves carries the maximum energy per photon ?
1) X-rays
2) Radio waves
3) Light waves
4) Microwaves
Q. A rainbow is produced due to which one of the following phenomena?
1) Dispersion of light
2) Interference of light
3) Diffraction of light
4) Scattering of light by atmospheric dust
Q. The statement that heat cannot flow by itself from a body at a lower temperature to a body at a higher temperature, is know as -
1) Zeroth law of thermodynamics
2) First law of thermodynamics
3) Second law of thermodynamics
4) Third law of thermodynamics
Q. Which one of the following waves does not belong to the category of the other three?
1) X-rays
2) Microwaves
3) Radiowaves
4) Sound waves
Q. Which one of the following statements is not correct ?
1) Ultrasonic waves cannot get reflected, refracted or absorbed
2) Ultrasonic waves are used to detect the presence of defects like cracks, porosity, etc. in the internal structure of common structure materials
3) Ultrasonic waves can be used for making holes in very hard materials like diamond
4) Ultrasonic waves cannot travel through vacuum
Q. Light year is a measure of -
1) time
2) distance
3) total amount of light falling on the Earth in a year
4) average intensity of light falling on the Earth in a year
Q. Water boils at a lower temperature at high altitudes, because -
1) the air pressure is less
2) outside temperature is less
3) latent heat is less
4) None of the above
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