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Voltmeters:
Voltmeters are used to measure emf's and more commonly potential differences. The two probes of the meter are therefore connected to the two points between which the potential difference is required.
If the potential at A with respect to B is required, the red lead is connected to point A, the black lead point B.If the potential at B with respect to A is required, the red lead is connected to point B, the black lead point A.If the potential between a point and Earth or ground is required. The red lead is connected to the point and the black lead is connected to ground or Earth.
The graph shown in Figure was obtained during an experiment on a diode. (a) What type of diode is this? Give reasons. (b) Determine the forward current for a forward voltage
If the intensity of sound is maximum at time t = 0, one beat is known as formed when intensity changes into maximum again after becoming minimum once in among.
Figure shows an arrangement of a carriage system. A force P is applied on the carriage B and moving rightward at 3 m/s 2 constant acceleration. At the instant shown the velocit
Which of the following colours of visible light has the longest wavelength? Is it: a) Violet b) Green c) Yellow d) Red Ans: Red colour of visible light h
the average speed of an object over a given time duration is 6 m/s. If it travels first half of the duration with a constant speed 4 m/s, its speed during the next half duration is
A FORCE OF 10I-3J+6K NEWTON ACTS ON A BODY OF 5KG AND IT DISPLACESFROM 6I+5J-3KMETRE TO 10I-2J+7K METRE. THE WORK DONE IS A)100J B)O C)121J D)NONE
A figure skater who while spinning in place drag her arms in to increase her rotational speed is most closely exhibiting which of the following Answer:- a) Conservation of
After being launched, a rocket attains a speed of 122 m/s before the fuel in the motor is completely used. If you suppose that the acceleration of the rocket is constant at 32.2 m/
Length contraction
12 joule of work has to be completed against an existing electric field to take a charge of 0.01 C from A and B. How much is the potential difference VB-VA.
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