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Class 9th Science:
Chapter -8
4. A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3 ms–2 for 8 s. How far does the boat travel during this time? Click to watch video solution
Class 10th Science:
Chapter -6 (Life Processes)
Q.5 How are fats digested in our bodies? Where does this process take place? Click to watch video solution
Chapter -10 (The Human Eye and the Colorful World)
Q. 5 A person needs a lens of power -5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting 1) distant vision and 2) near vision Click to watch video solution
Q. 6 The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem? Click to watch video solution
Chapter -12 (Electricity)
Q.5 How is a voltmeter connected in the circuit to measure the potential difference between two points?
Q. 10 How many 176 Ω resistors (in parallel) are required to carry 5 A on a 220 V line?
Q. 12 Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A? Click to watch video solution
Q. 16 Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes? Click to watch video solution
Class 10th Mathematics :
Chapter 15 (Probability)
Q.13 A die is thrown once. Find the probability of getting i) a prime number(ii) a number lying between 2 and 6 (iii) an odd number Click to watch video solution