represents radiation pressure c represents speed of light

A car is moving at a constant speed of 40 km h along a straight road which heads towards a large vertical wall and makes a sharp 90 turn by the side of the wall A fly flying at a constant speed of 100 km h starts from the wall towards the car at an instant when the car is 20 km away flies until it reaches the glasspane of the car and returns to the wall at the same speed It continues to fly between the car and the wall till the car makes the 90 turn a What is the total distance the fly has travelled during this period b How many trips has it made between the car and the wall

Choose the correct statement following 1 Dimensionless quantities can have a unit 2 A dimensionally correct equation must be correct 3 Change in system of units will surely change the numerical value of the physical quantity 4 Dimensions of a physical quantity can never be a fraction

36 If A 21 31 and B 41 61 2k then the angle between A and B is a 45 c 000 b 690 d none

30 of the resistors shown in figure 32 E11 has a resistance of 10 2 and each of the batteries has an emf of 10 V Find the currents through the resistors a and b in the two circuits a a b a E11 E2 Figure 32 E11 36 Find the potential difference V V in the circuits shown in figure 32 E12 H R3 a R R a b b b a b R2

A closed loop carrying current i is placed so that its plane is perpendicular to the long current carrying straight conductor as shown in the figure The net force acting on the loop is where WZ and XY are circular arcs H 40 Sortio w 1 Zero 2 5000 3 CO Moi i b a 2 ab Molio a b b a X N 22 2 Mot 27 BW x B B w x dx b M

In a simple pendulum length increases by 4 and g increases by 2 then time period of simple pendulum 1 Increases by 4 2 Increases by 3 3 Decreases by 3 4 Increases by 1

ABCDEF is a regular hexagon with point O as center The value of AB AC AD AE AF Pis 1 2AO 2 4AO 3 6AO 4 0

A particle of mass m is executing oscillation about the origin on the x axis Its potential energy is U x K x 3 where k is a positive constant If the amplitude of oscillation is a then its time period Tis Eska 2 2 1 2mv 1 alf K 3Kx 2 tom 3k ma Proportional to 2 Proportional to a 3 3 Proportional a

A physical quantity of the dimensions of length that can be e formed out of c G and is c is velocity of light G 4 0 is universal constant of gravitation and e is charge 2017 200 G a e 4 EO 71 2 71 2 0 4 42 102 1 e G47 b c 648 G d G e 71 2 C 47 E

Consider a simple pendulum having a bob attached to a string that oscillations under the action of force of gravity Suppose that period of oscillations of the simple pendulum depends on its length I mass of the bob m and acceleration due to gravity g Derive the expression for the time period using method of dimensions