Question
A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V. Write Yes or No. Give supporting calculations to justify your answer.
A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V. Write Yes or No.…
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In a reading glass what is the position of the object
(a) In a reading glass what is the position of the object with respect to the convex lens used? (b) Why can…
Question
Rohan conducted experiments on echo in different media
Rohan conducted experiments on echo in different media. He observed that a minimum distance of ‘x’ meters is required for the echo…
Question
Five identical bulbs are connected in series to a source of electricity
5 bulbs are connected in series in a room. One bulb is fused. It is removed and remaining 4 bulbs are again…
Question
Sumit does 600 J of work in 10 minutes and Amit does 300 J in 20 minutes
Sumit does 600 J of work in 10 min and Amit does 300 J of work in 20 min. Calculate the ratio…
Question
Meera chose to use a block and tackle system of ‘9’ pulleys
Meera chose to use a block and tackle system of ‘9’ pulleys instead of a single movable pulley to lift a heavy…
Question
A non-uniform beam of weight 120 N pivoted at one end
A non-uniform beam of weight 120 N pivoted at one end is shown in the diagram below. Calculate the force F required…
Question
A stone tied to a string is rotated in a horizontal plane
Fill in the blanks: (a) A stone tied to a string is rotated in a horizontal plane. The tension in the string…
Question
In the following atoms identify the radioisotope and name the class of lever
(a) In the following atoms, which one is a radioisotope? Give one use of it. O-16, C-14, N-14, He-4 (b) Name the…
Question
A block of glass is pushed into the path of light as shown below
A block of glass is pushed into the path of light as shown below. The point X will: (a) move away from…