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Find out the following in the electric circuit given in Figure (b) Current flowing through 4 Ω resistor.

Answer: Given V = 8V R1 = 8Ω R2 = 8Ω R3 = 4Ω Two 8Ω resistors are conneted in parallel, then their effective... View Article

Find out the following in the electric circuit given in Figure (a) Effective resistance of two 8 Ω resistors in the combination

Answer: (a) Two 8Ω resistors are conneted in parallel, then their effective resistance is 1/RP = 1/8 + 1/8 1/RP = 1/4 RP = 4Ω A... View Article

The accurate representation of a series combination of cells obtaining maximum potential is (1) (i) (2) (ii) (3) (iii) (4) (iv)

Answer: (1) (i) If the negative terminal of one cell is connected to the positive terminal of the other cell, the cells are connected in... View Article

____________is the minimum resistance which can be made using five resistors each of 1/5 Ω? (1) 1/5 Ω (2) 1/25 Ω (3) 1/10 Ω (4) 25 Ω

Answer: (2) 1/25 Ω Minimum resistance is obtained when resistors are connected parallel. 1/R = 5 + 5 + 5 +5 +5= 25 Ω R = 1/25Ω A circuit is... View Article

One ampere (1 A) current is is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly (a) 10²⁰ (b) 10¹⁶ (c) 10¹⁸ (d) 10²³

Answer: (a) 1020 Given parameters Current(I) = 1 A Time (t) = 6 sec e = 1.6 × 10 -19C I = Q/t Q = It Q = 1 x 16 Q= 16 q Q = ne n = Q/e n... View Article

A jar contains 24 marbles, some are green and others are blue. If a marble is drawn at random from the jar, the probability that it is green is ⅔. Find the number of blue balls in the jar.

Answer: Total marbles = 24 Let the total green marbles = x So, the total blue marbles = 24 - x P(getting green marble) = x/24 From the question,... View Article

A student argues that ‘there are 11 possible outcomes 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. Therefore, each of them has a probability 1/11. Do you agree with this argument? Justify your Solution.

Answer: If 2 dices are thrown, the possible events are: (1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6) (2, 1), (2, 2), (2, 3), (2, 4), (2, 5),... View Article

Rohan’s mother is 26 years older than him. The product of their ages (in years) 3 years from now will be 360. We would like to find Rohan’s present age

Answer: Let us consider, Age of Rohan’s = x years Therefore, as per the given question, Rohan’s mother’s age = x + 26... View Article

Two mirrors meet at right angles. A ray of light is incident on one end at an angle of 30o as shown in figure. Draw the reflected ray from the second mirror.

Answer: We can solvethe above problem using laws of reflection. The process through which light rays fall on the surface and gets bounced back... View Article

Calculate the compound interest and amount on Rs 10,800 for 3 years at 12(1/2)% per annum compounded annually.

Answer: Given parameters Prinicipal (P) = Rs 10800 Time (n) = 3 years Rate of interest (R) = 12(1/2)% . . . . . A = ₹ 15,377.34 Amount... View Article

Find the value of (-2)³ × (-10)³.

Answer: Consider (-2)3 (-2)3 = (-2) × (-2) × (-2) We know that (-) × (-) = (+) (-) × (+) = (-) (-2)3 = (+4) ×... View Article

Find the value of 11²?

Answer: Exponents and powers are ways used to represent very large numbers or very small numbers in a simplified manner. Basically, power is an... View Article

Find the value of 2⁶?

Answer: Exponents and powers are used to simplify the representation of very large or very small numbers. There are different laws or rules... View Article

Tiger is a ___ because it eats only meat. Fill the blanks with the given words (herbivore, plant, milk, sugarcane, carnivore).

Answer: Tiger is a carnivore because it eats only meat. Carnivores or carnivorous animals rely on other animals for their food. These animals... View Article