Parallelogram Law of Vectors.
 1) In the experiment, on finding the weight of a given body bythe parallelogram law of vectors, the student needs to use : Three pulleys and two weights in all Three pulleys and two weights in all Two pulleys and two weights in all Two pulleys and three weights in all

 2) In the experiment on finding the unknown weight, using the parallelogram law of vectors, the student should : not lubricate the pulleys and use a woollen thread not lubricate the pulleys and use a cotton thread lubricate the pulleys and use a woolen thread lubricate the pulleys and use a cotton thread

 3) In the experiment on finding the weight of a given body by the parallelogram law of vector, a student observes that he can find the unknown weight by using two equal weights of 100 g each makes an angle 90 degree. The unknown weight is likely to have a value of (nearly) : 102 g wt 141 g wt 500 g wt 100 g wt

 4) Which of the following statements is correct? Physical quantities, having both magnitude and direction are called vector quantities. Vector quantities obey vector algebra. All of these. Physical quantities, having only magnitude, are called scalar quantities.

 5) Which of the following is a scalar quantity? Weight Speed Displacement Velocity

 6) Which of the following is a vector quantity? Electric charge Acceleration Distance Mass

 7) Rectangular components of a vector: Are perpendicular to each other Start from the origin of the vector All of the above Lie on the same plane

 8) What are the main sources of error in the experiment using Gravesand's apparatus? None of these Weights in the threads. Both of these. Friction in the pulleys.

 9) Which of the following statements is correct? Due to friction on the pulleys, the thread junction does not come at rest at same position always. The friction can be reduced by oiling the pulleys. Suspended weights are kept free to avoid changes in effective weight due to reaction of board or table. All of these.

 10) In parallelogram law of vector addition the resultant of the vector is represented by ---------------- opposite side of the parallelogram any adjacent side of the parallelogram None of these diagonal of the parallelogram

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