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11. First law of thermodynamics stales that.
(A) System can do work
(B) System has pressure
(C) System has energy
(D) Heat is a form of energy
12. Velocity of sound is maximum in –
(A) Air
(B) Vacuum
(C) Water
(D) Steel
13. In an isothermal change an ideal gas obeys.
(A) Boyle’s Law
(B) Gaylussac Law
(C) Charle’s Law
(D) None of these
14. Electron volt is a unit of –
(A) Charge
(B) Momentum
(C) Energy
(D) Potential difference
15. Light year is a unit of –
(A) Time
(B) Mass
(C) Energy
(D) Distance
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16. The unit of reactance of –
(A) ohm
(B) Mho
(C) Volt
(D) Newton
17. The dimensions of pressure is equal to –
(A) Force per unit volume
(B) Force
(C) Energy per unit volume
(D) Energy
18. Joule – Second is the unit of –
(A) Work
(B) Pressure
(C) Momentum
(D) Angular Momentum
19. Faraday Is the unit Of –
(A) Charge
(B) Mass
(C) Pressure
(D) Energy
20. Light travels at the fastest speed in –
(A) Glass
(B) Water
(C) Hydrogen
(D) Vacuum
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