Physics Mcqs

Physics Mcqs

Question : A second is defined as the duration of vibration of

1. A. Carbon atom
2. B. Cesium atom
3. C. Radium atom
4. D.Nitrogen atom

Question : The equation of state for n moles of an ideal gas is PV=nRT. The SI unit of universal gas constant R is

1. A. Erg K-1 mole-1
2. B.Watt K-1 mole-1
3. C.Newton K-4 mole-1
4. D.Joule K-1(K mole)-1

Question : Two farces of same magnitude are acting on an object, the magnitude of their resultant is minimum if the angle between them is

A. 60°

B. 45°

C. 90°

D. 180°

Question : If two forces each of magnitude 5N act along the same line on a body, then the magnitude of their resultant will be

A. 5N

B. 15N

C. 20N

D. 30N

Question : Applied force F on a body of mass m, moving with acceleration a is

A. m/a

B. a/m

C. ma

D. a:m

Question : A force of 1000N acts on a body for 0.01 sec. And changes its velocity from 10m/s to 

20m/s, what will be the impulse?

A. 100N-sec

B. 50N-sec

C. 10N-sec

D. 5N-sec

Question : When a projectile moves upwards, its vertical component of velocity

1. A.Remains constant
2. B. Decreases
3. C.Increase
4. D. Becomes equal to horizontal velocity

Question : At the highest point, a projectile has its vertical component of velocity equal to

A, Minimum

B. Maximum

C. Equal to horizintal velocity

D. Equal to initial velocity

Question : The center of gravity of a cylinder is at

1.  A.The center of the top of the cylinder
2. B.The center of the bottom of the cylinder
3. C.A point on curved side of the cylinder
4. D. The mid-point of axis

Question : Angular momentum is defined as

1.  A.The dot product of position vector and linear momentum
2.  B. The cross product of position vector and linear momentum
3. C.The simple product of position vector and liner momentum
4. D. The product of distance and liner momentum