The dimension of elastic modulus is:
A. ML-1T-2
B. ML-2T-2
C. MLT-2
D. ML2T-2
In open organ pipe:
A. only even harmonics are present
B. only odd harmonics are present
C. both even and odd harmonics are present
D. selected harmonics are present
Doppler effect applies to:
A. sound wave only
B. light wave only
C. both sound and light waves
D. neither sound nor light wave
Beats are the results of:
A. diffraction of sound waves
B. constructive and destructive interference
C. polarization
D. destructive interference
The normal ear is the most sensitive in the frequency range:
A. 20000 to 30000 hertz
B. 10 to 20 hertz
C. 2000 to 4000 hertz
D. 6000 to 8000 hertz
Reciprocal of resistivity is called:
A. resistance
B. inductance
C. conductivity
D. flexibility
Resistance of an ideal insulator is:
A. infinite
B. zero
C. finite
D. depends upon nature
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 energy
The beats frequency (sensible) for a human car is:
A. 42Hz
B. 7 Hz
C. 256Hz
D. 262Hz
Resistance of a conductor depends upon:
A. nature of conductor
B. dimension of conductor
C. physical state of the conductor
D. all of above
