Physics

A two point charges $4q$ and $-q$ are fixed on the $x$ -axis at $x=-\frac{d}{2}$ and $x=\frac{d}{2}$ , respectively. If a third point charge ' $q$ ' is taken from the origin to $x=d$ along the semicircle as shown in the figure, the energy of the charge will:

Take the breakdown voltage of the zener diode used in the given circuit as $6\mathrm{V}$ . For the input voltage shown in figure below, the time variation of the output voltage is: (Graphs drawn are schematic and not to scale)

A Tennis ball is released from a height $h$ and after freely falling on a wooden floor it rebounds and reaches height $\frac{h}{2}$ . The velocity versus height of the ball during its motion may be represented graphically by:

(graphs are drawn schematically and on not to scale)

In experiment of find acceleration due to gravity (g) using simple pendulum, time period of 0.5s is measured from time of 100 oscillation with a watch of 1 s resolution. If measured value of length is 10 cm known to 1 mm accuracy, The accuracy in the determination of g is found to be x%. The value of x is_______.

In an experiment with a convex lens, The plot of the image distance (v') against the object distance $\left(\mu \text{'}\right)$ measured from the focus gives a curve v $\text{'}\mu \text{'}$ = 225. If all the distances are measured in cm. The magnitude of the focal length of the lens is__________cm.

An object 'O' is placed at a distance of 100 cm in front of a concave mirror of radius of curvature 200 cm as shown in the figure. The object starts moving towards the mirror at a speed 2 cm/s. The position of the image from the mirror after 10 s will be at________cm.

For the given circuit the current through battery of 6 V just after closing the switch 'S' will be_______A.

For the given circuit the current through battery of 6 V just after closing the switch ‘S’ will be_______A.

An electrical bulb rated 220 V, 100 W, is connected in series with another bulb rated 220 V, 60 W. If the voltage across combination is 220 V, the power consumed by the 100 W bulb will be about ______W.

The potential energy of a particle of mass 4 kg in motion along the x-axis is given by $U=4\left(1-cos4x\right)J.$ The time period of the particle for small oscillation (sin = ) is $\left(\frac{\pi }{K}\right)s.$ The value of K is_______.