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 second law of thermodynamics introduces the concept of
A) Heat
B) Temperature
C) Entropy
D) Internal energy of the system
Q. ten years ago ram was thrice as old as shyam was but 10 years hence he will be only twice as old. what is ram's present age
A) 60
B) 65
C) 68
D) 70
Q. Boundary line between Pakistan and India
A)  Radcliffe line  
B) Durand line  
C) Maginot line  
D) McMahon line
Q. Plants that grow in seashores are called as :
A) Halophytes  
B) Hydrophytes  
C)  Xerophytes  
D) Psammophytes
Q. Which of the following quantities is a vector
A) Area
B) Volume
C) Angle
D) Speed
Q. the potential energy associated with an electron in the orbit
A) increases with increase in radii of orbit
B) decreases with increase in radii of orbit
C) remains unchanged with the change in radii of the orbit
D) none of these
Q. A subway train starts from rest at a station and accelerate at rate 2m/s2 for 10 sec. it then runs at a constant speed for 30s and deaccelerates at 4m/s2 until it stops at the next station. the distance between the two stations is
A) 650m
B) 700m
C) 750m
D) 800m
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 a diode can be increased by
A) lower plate potential
B) raising plate potential
C) increasing cathode temperature
D)  decreasing cathode temperature
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
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