Physics Test # 1

 

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Physics Test 1

Multiple Choice Identify the choice that best completes the statement or answers the question.
A B C D	1.	Centripetal force of a body in a circle is increased by ...... a. Increase in its length b. Increase in its mass c. Decrease in centrepetal force d. Decrease in speed
A B C D	2.	A body moving in constant acceleration ........ a. Remains in constant speed b. Change in velocity in length c. Covers equal distance in equal intervals of time d. Increase in instantaneous velocity
A B C D	3.	When a bus suddenly stops due to .........   man receives an impulse in forward direction. a. Law of inertia b. Second law of motion c. Third law of motion d. Illness
A B C D	4.	When a body goes up with 2g acceleration then ....... a. Double the mass of body b. Double the acceleleration of body c. Double the length of body d. Double the velocity of body
A B C D	5.	If a body is dropped from ..... meters height it meets the ground after 3 sec. a. 25 b. 19 c. 100 d. 44.1
A B C D	6.	Limiting friction is always ........  then rolling friction a. Less than b. Equal to c. Greater than d. Coefficient
A B C D	7.	When tow planets ....... then the gravitational attraction becomes greater. a. Move apart      b. Turn into another galaxy c. Move closer d. Colide together
A B C D	8.	The potential energy of a body changes ......... a. Directly with mass and inversely with height b. Directly with mass and inversely with height c. Directly with both mass and height d. None of these
A B C D	9.	The work of a vody is equal to the product of ........ a. Mass and acceleration b. Mass and velocity c. Force and displacement d. Velocity and time
A B C D	10.	The ratio of output and input is called ..... a. Mechanical advantage b. Efficiency c. Velocity d. Power
A B C D	11.	If we do below the center of gravity of a body then it is ........ a. Stable b. Unstable c. Neutral d. Temporary
A B C D	12.	The density of a body is increased by .......... a. Increasing its mass b. Increasing its vilocity c. Increase in its specific area d. Decreasing its mass
A B C D	13.	The increase in temprature of a body in a unit mass upto 1C is called a. Latent heat of fusion b. Specific heat c. Latent heat of evaporation d. External heat capacity
A B C D	14.	In parallel circuit resistance is a. Less than resistance b. Equal to sum of resistance c. Equal to sum of current d. Equal to sum of voltage
A B C D	15.	In any circuit current is directly proportion to a. Potential differance b. Resistance c. Length of wire d. Area of wire
A B C D	16.	The strength of a megnet depends upon a. Number of turn of coil b. Current through coil c. Length of coil d. Both a & b
A B C D	17.	Total internal reflection takes place when a. Less than critical angle b. Greater than critical angle c. Enter from denser medium to rare medium d. None of these
A B C D	18.	The rainbow is a result of a. Reflection b. Refractin c. Diffraction d. Dispersion
A B C D	19.	The pitch depends upon a. Frequency b. Amplitude c. Speed d. Echo
A B C D	20.	Transistor consists on  ................  junction a. PNP b. NPN c. Rectifier d. Both a & b
A B C D	21.	The ray falling on the centre of mirror passes through a. Focal length b. Focuss c. Normal d. parallel
A B C D	22.	When a body is placed between convex mirror and its focuss poin then its image will be a. Virtual b. Real c. Real and inverted d. Smaller
A B C D	23.	Between two electric charges force is directly proportional to a. Product between masses b. Distance between them c. Product of their charges d. Square of distance between them
A B C D	24.	The light reaches on earth from sun through a. Conduction b. Retardation c. Rediation d. Evaporation
A B C D	25.	Beta rays consist on a. Negatively charged in vacume b. positively charged in vacume c. Gama rays d. Beta rays