Please select a subject first
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Which of the radioactive radiations can cause severe genetical disorders and are deflected by an electric field?
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Which one of the following statements is correct?
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The diagram below shows a free conductor AB is kept in a magnetic field and is carrying current from A to B. (To avoid confusion complete path of the circuit is not shown) The direction of the force experienced by the conductor will be:
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The meaning of the statement ‘Specific heat capacity of water is 4200 J kg-1 K-1’ is:
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The radiation with maximum penetrating power is ______.
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If the strength of the current flowing through a wire is increased, the strength of the magnetic field produced by it ______.
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A copper conductor is placed over two stretched copper wires whose ends ate connected to a D.C. supply as shown in the diagram.
- What should be the magnetic poles at the points A and B lying on either side of the conductor to experience the force in the upward direction?
- Name the law used to find these polarities.
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A coin kept inside water [µ = 4/3] when viewed from air in a vertical direction appears to be raised by 3.0 mm. Find the depth of the coin in water.
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A metre scale of weight 50 gf can be balanced at 40 cm mark without any weight suspended on it.
- If this ruler is cut at its centre then state which part [0 to 50 cm or 50 to 100 cm] of the ruler will weigh more than 25 gf.
- What minimum weight placed on this metre ruler can balance this ruler when it is pivoted at its centre?
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Copy and complete the labelled diagram connecting the two pulleys with a tackle to obtain Velocity Ratio= 2.
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If Load = 48 kgf and efficiency is 80% then calculate:
- Mechanical Advantage.
- Effort needed to lift the load.
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The adjacent diagram shows the movable block of a block and tackle system with effort in a convenient direction. From the diagram we can conclude that the number of pulleys used in the fixed block are ______.
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According to the old convention, the colour of the earth wire is ______.
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In a block and tackle system, increase in the weight of the movable block ______ the efficiency of the pulley system.
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The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.
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Name the law used to identify the radioactive radiation emitted by the element.
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Explain the motion of a planet around the sun in an elliptical path.
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A water pond appears to be 3 m deep. If the refractive index of water is 4/3, find the actual depth of the pond.
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A coin is placed at the bottom of a beaker containing water (refractive index = 4/3) at a depth of 16 cm. By what height the coin appears to be raised when seen from vertically above?
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What is the colour code for the insulation on the earth wire?
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What is the colour code for the insulation on the neutral?
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