Q. when a charged particle moves in a transverse magnetic field, it path of motion is
A) parabolic
B) circular
C) elliptical
D) linear
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 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. 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. work function is generally expressed in
A) electron volt
B) joule
C) newton
D) gauss
Q. An electron of mass M kg and charge ‘e’ columbs travel from rest through a potential difference of V volts. The field energy of electron in joule is
A) MeV
B) eV/M
C) eV
D) e/V
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
Q. Thermonic emission was discovered by
A) Thomas Edison
B) lee de forest
C) fleming
D) Rutherford
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
Today Challenging Question
Q. If a boat is moving in upstream with velocity of 14 km/hr and goes downstream with a velocity of 40 km/hr, then what is the speed of the stream ?
A) 13 km/hr
B) 26 km/hr
C) 34 km/hr
D) none of these
1 members solved
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