Time rate of change of momentum is equal to____________________?
Time rate of change of momentum is equal to____________________?
A. force
B. impulse
C. velocity
D. both A and C
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The audio signals of TV are _____________?
The audio signals of TV are _____________?A. Amplitude modulated
B. Frequency modulated
C. fixe modulated
D. Velocity modulatedNewton’s Third Law of Motion?
Newton’s Third Law of Motion?A. every action there is an equal and opposite reaction.
B. attraction or repulsion between two charges
C. volume of a given mass of gas increases or decreases
D. temperature remaining constant, volume of a given mass of a gas varies inverselyThe direction of propagation of an electromagnetic waves is________________?
The direction of propagation of an electromagnetic waves is________________?A. Perpendicular to electric field
B. Perpendicular to both electric and magnetic field
C. Perpendicular to magnetic field
D. Parallel to electric and magnetic fieldHydrogen atom does not emit X-rays because _________________?
Hydrogen atom does not emit X-rays because _________________?A. its energy levels are too close to each other
B. its energy levels are too far apart
C. it is too small in size
D. it has a single electronIn an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?
In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?A. he/ev
B. he/Vc
C. eV/h
D. impossible to predictThe first overtone of a stretched string of given length is 320 Hz. The first harmonic is_________?
The first overtone of a stretched string of given length is 320 Hz. The first harmonic is_________?A. 320 Hz
B. 640 Hz
C. 160 Hz
D. 480 Hz