Collection of Physics Questions from Class X

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A COLLECTION OF QUESTIONS FROM CLASS X (10) CBSE PHYSICS REQUIRING HIGHER ORDER THINKING SKILLS (Includes questions from sample paper issued by CBSE) 1. Two students perform the experiments on series and parallel combinations of two given resistors R1 and R2 and plot the following V-I graphs. [pic] Which of the graphs is (are) correctly labelled in terms of the words ‘series’ and parallel’ Justify your answer. 2. You are given following current-time graphs from two different sources: [pic] (i) Name the type of current in two cases. (ii) Identify any one source for each type of these currents. (iii) What is the frequency of current in case II in India? (iv) Use above graphs to write two difference between the current in two cases. 3. Two metallic wires A and B are connected in parallel. Wire A has length l and radius r, wire B has a length 2l and radius 2r. Compute the ratio of the total resistance of parallel combination and the resistance of wire A. 4. A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that (i) the direction of deflection of the north pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery sending current in the wire are inter changed. (ii) for a given battery, the degree of deflection of a N-pole decreases when the compass is kept at a point farther away from the conductor. Which of the above observations of the student is incorrect and why? 5. A beam of white light falling on a glass prism gets split up into seven colours marked 1 to 7 as shown in the diagram. A student makes the following statements about the spectrum observed on the screen. [pic] a) The colours at positions marked 3 and 5 are similar to the colour of the sky and the core of a hard boiled egg

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