X-rays are similar in nature to_______________?
X-rays are similar in nature to_______________?
A. Cathode rays
B. Positive rays
C. γ-rays
D. Beta rays
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A changing magnetic flux produces around itself an induced_______________?
A changing magnetic flux produces around itself an induced_______________?A. Magnetic field
B. Electric field
C. Electromagnetic force
D. Artificial gravitational fieldUltrasonic have__________________?
Ultrasonic have__________________?A. frequency in the audible range
B. frequency is greater than 20 kHz
C. frequency lower than 20 Hz
D. all of aboveThe velocity of sound in air would become double than its velocity at 0°C at temperature________________?
The velocity of sound in air would become double than its velocity at 0°C at temperature________________?A. 313°C
B. 586°C
C. 819°C
D. 1172°CAlpha particles possess greater penetration power than that of beta particles due to its_____________?
Alpha particles possess greater penetration power than that of beta particles due to its_____________?A. Smaller ionization power
B. Greater ionization power
C. Neither greater nor smaller ionization power
D. Same ionization powerThermocouples convert___________________?
Thermocouples convert___________________?A. heat energy into electrical energy
B. heat energy into light energy
C. heat energy into mechanical energy
D. mechanical energy into heat energyRadioactive decay obeys which one of the following law ?
Radioactive decay obeys which one of the following law ?A. N=Noe-λt
B. N=Noeλt
C. N=Noe-λt/2
D. No=N(1+eλt)