1. To at Rot Rat - 1 sin 60° cos 30° + sin 30° cos 60° (1) 2 tan 450+ cos² 30° - sin 60° cas 450 un soc 30 + cosec 30° (v) sin 30° + tan 45° - cosec 60° soo 30° + cos 60° + cot 45° scor 60° + 4 sec 30° - tan* 45° sin 30° + cos² 30°
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Who noticed the deflection of the compass needle every time the current was passed through the wire? When an electric current flows through a wire, it behaves like a magnet.
By connecting a high resistance in series with the galvanometet
what is the difference between the two ?
pressure inside a liquid jet in excess of atmostpheric pressure . for example if aglass tube of samll diameter is partially immersed in water , the water will wet the surface of the tube ant it will rise in the tube to some height above the normal water surface . In this case, the water surface is concave upward.
In this collision
Coefficient of restitution 0 < e < 1
The loss in kinetic energy appears in other forms, such as heat, sound etc.
Ex- Collision between two billiard balls. All majority of collision belong to this category.
momentum is conserved whereas KE is not conserved as in elastic collision
A massless rope is fixed at one end as shown in fig. Two boys of masses 40kg and 60kg are moving along the rope. The former climbing up with an accelaration of while later coming down with constant velocity of . The tension at fixed support will be (g=)
Physics has many definitions. In simple words Physics is branch of science concerned with the nature and properties of matter and energy
Time (T), velocity (C) and angular momentum (h) are chosen as fundamental quantities instead of mass, length and time. In terms of these, the dimensions of mass would be :
Molarity based on vol. Of solvent in 100litre of solu. While normality is gram molecular mass
Capacitance in a medium
A man of mass () is sitting in a train movingwith velocity . He observe that a block of mass is moving towards him with velocity . Then the kinetic energy of block w.r.t man is (Assume )
A block of mass m is kept on a platform which starts from rest with constant acceleration g/2 upward, as shown in the figure. Work done by normal reaction on block in time t is:
When the rms voltages VL, VC and VR are measured respectively across the inductor L, the capacitor C and the resistor R in a series LCR circuit connected to an AC source, it is found that the ratio VL : VC : VR = 1 : 2 : 3. If the rms voltage of the AC source is 100 V, then VR is close to ?
10 identical cell in series are connected to the ends of a resistance of 59,the current is found to be 0.25A. But when the same cells being connected in parallel,are joined to the ends of a resistance of 0.05,the current is 25A EMF of each cell is