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Physics Questions Answers
Consider the following scientists:
1. Gerardus't Hooft
2. H.D. Politzur
3. Martinus J.G. Veltman
4. D. Gross
The 1999 Nobel Prize in Physics was awarded to
1 and 2
2 alone
2 and 4
1 and 3
1 and 3
Five bulbs each of 100 watt capacity in a tunnel are illuminated continuously for twenty hours. The consumption of electricity will be—
One unit
Two units
Ten units
Twenty units
Ten units
A mobile phone charger is—
An inverter
A UPS
A step up transformer
A step down transformer
A step down transformer
Television viewers using dish antenna to receive satellite signals do not receive signals during rain because-
1. of small size of antenna.
2. rain droplets absorb the energy of radio waves.
3. rain droplets disperse the energy of radio waves from their original direction.
Which of the above statements are correct?
Only 1
1 and 2
2 and 3
1, 2 and 3
2 and 3
Which one of the following statements about energy is correct?
Energy can be created as well as destroyed
Energy can be created but not destroyed
Energy can neither be created nor destroyed
Energy cannot be created but can be destroyed
Energy can neither be created nor destroyed
Step-up transformers are used for—
increasing electrical power
decreasing electrical power
decreasing voltage
increasing voltage
increasing voltage
Which one among the following waves carries the maximum energy per photon?
X-rays
Radio waves
Light waves
Microwaves
X-rays
How much CO2 is produced on heating of 1 kg of carbon?
11/3 kg
3/11 kg
4/3 kg
3/4 kg
11/3 kg
Which one of the following waves does not belong to the category of the other three?
X-rays
Microwaves
Radiowaves
Sound waves
Sound waves
Which one of the following statements is not correct?
Ultrasonic waves cannot get reflected, refracted or absorbed
Ultrasonic waves are used to detect the presence of defects like cracks, porosity, etc. in the internal structure of common structure materials
Ultrasonic waves can be used for making holes in very hard materials like diamond
Ultrasonic waves cannot travel through vacuum
Ultrasonic waves cannot get reflected, refracted or absorbed