Physics-
General
Easy
Question
In the circuit shown in figure reading of voltmeter is 
when only 
is closed, reading of voltmeter is 
when only 
is closed. The reading of voltmeter is 
when both and are closed then
The correct answer is:
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When an ammeter of negligible internal resistance is inserted in series with circuit it reads 1 A. When the voltmeter of very large resistance is connected across X it reads 1 V. When the point A and 
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When an ammeter of negligible internal resistance is inserted in series with circuit it reads 1 A. When the voltmeter of very large resistance is connected across X it reads 1 V. When the point A and are shorted by a conducting wire, the voltmeter measures 10 V across the battery. The internal resistance of the battery is equal to
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Fig. shows a part of circuit. When a current I=1.5A passes through it in the direction shown, power delivered to it (section XY) is 75 W. Potential difference between X and Y and also the emf E of the cell are respectively ( assume that the cell has a negligible internal resistance)
Fig. shows a part of circuit. When a current I=1.5A passes through it in the direction shown, power delivered to it (section XY) is 75 W. Potential difference between X and Y and also the emf E of the cell are respectively ( assume that the cell has a negligible internal resistance)
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Two current elements P and Q have current voltage characteristics as shown below :
Which of the graphs given below represents current voltage characteristics when P and Q are in series.
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Which of the graphs given below represents current voltage characteristics when P and Q are in series.
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A rod of length L and cross-section area A lies along the x-axis between x=0 and x=L. The material obeys Ohm's law and its resistivity varies along the rod according to 
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A converging mirror 
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In the figure shown if the object ' O' moves towards the plane mirror, then the image (which is formed after successive reflections fram 
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In the figure shown, the image of a real object is formed at point I. AB is the principal axis of the mirror. The mirror must be :
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The circular boundary of the concave mirror subtends a cone of half angle 
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A concave mirror of focal length 20cm is cut into two parts from the middle and the two parts are moved perpendicularly by a distance 1cm from the previous principle axis AB. The distance between the images formed by the two parts. If the dbject is kept at a distance of 10cm from the pole of the original principal axis is
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Two blocks each of mass 
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