Q. in a halfwave rectifier the rms valve of the a.c component of the wave is
A) greater than d.c value
B) less than d.c value
C) equal to d.c value
D) zero
Q. An ideal gas engine operates in a carnot cycle. it absorbs heat at a temperature T1 and exhaust heat at T2. the efficiency of this engine is
A) (T1-T2)/T1
B) (T1+T2)/T1
C) (T1-T2)/T2
D) T1/T2
Q. If the universal gravitational constant were decreasing with time, then satellite in orbit would still maintain its
A) Orbital radius
B) Angular momentum
C) Tangential speed
D) period of revolution
Q. The saturation current in diode valve depends upon
A) plate voltage
B) temperature of the filament
C) neither a nor b
D) both a and b
Q. The second law of thermodynamics introduces the concept of
A) Heat
B) Temperature
C) Entropy
D) Internal energy of the system
Q. The manifestation of band structure in solids is a consequence of
A) Pauli's exclusion principle
B) Heisenberg's uncertainity principle
C) Bohr's principle  
D) Ohm's law
Q. the saturation current in a diode can be increased by
A) lower plate potential
B) raising plate potential
C) increasing cathode temperature
D)  decreasing cathode temperature
Q. an electron moves with a constant velocity V parallel to the direction of uniform magnetic field B. the force experienced by the electron is
A) BeV
B) eV/B
C) B/eV
D) zero  
Q. The velocity with which a projectile must be fired so that it escapes earth's gravitation doesnt depend on
A) mass of the earth
B) Mass of the projectile
C) Radius of the orbit
D) Gravitational constant
Q. what is the SI unit of Young modulus of elasticity
A) dyne/cm
B) newton/m
C) newton/m2
D) m2/s
Today Challenging Question
Q. find the compound interest on Rs.50000 at 16% per annum for 2 yrs, compounded anually
A) 17280
B) 17000
C) 17500
D) 17300
4 members solved
© Copyright 2016 EQANS