Physics question and answers for August 08, 2024
- Q A source of frequency f is rotating in a circular path of radius R An observer in the same plane is also rotating in a circular path of radius 2R...
- Q A man running on a horizontal road at 8 km h finds the rain falling vertically He increases his speed to 12 km h a finds that the drops make...
- Q The magnetic field at point P in the hollow cylindrical wire carrying a current i shown in the figure at a distance r from axis a r b is given...
- Q What is the equivalent resistance of the circuit 2 3 4 Correct Answer 3 our Answer 2 Status incorrect 60 70 80 90 4V 12 20 HFww 402 ww V...
- Q 5 Three one over the other as shown in figure Find the minimum force needed to cause the motion in any part of the system Coefficient of friction is written...
- Q 2 A photon of energy E ejects a photo electron from a metal surface whose work function is Po The electron then enters into an uniform magnetic field B in...
- Q Four identical charges Q are fixed at the four corners of a square of side a The electric field at a point P located symmetrically at a distance a 2...
- Q Five point charges each of value q are placed on five vertices of a regular hexagon of side L metre Wha is the magnitude of the force on a point...
- Q Board Competitive Exams 23 A wire of natural length Young s modulus Y and area of cross section A is extended by x Then the energy stored in the wires...
- Q When the light source is kept 20 cm away from a photo cell the stopping potential is 0 6 V If the source is kept 40 cm away then the...
- Q Six forces lying in a plane and forming angles of 60 relative to one another are applied to the center of a homogenous sphere with a mass m 6 kg...
- Q A particle is thrown at an angle a sin in air as shown in the figure The angle received from the inside wate is water A 15 Only one correct...
- Q 3 An n p n transistor is used in common emitter configuration as an amplifier with 1k2 load resistance Signal voltage of 10mV is applied across the base emitter This...
- Q A sphere of radius R carries charge such that its volume charge density is proportional to the square of the distance from the center What is the ratio of the...
- Q When a metallic surface is illuminated by a light of frequency 8 10 4 Hz photoelectron of maximum energy 0 5eV is emitted When the same surface is illuminated by...
- Q A metallic wheel of radius and 8 spokes is rotated in a uniform magnetic field Bas shown The motional EMF across centre and rim is given by B X Only...
- Q 3 Given a uniform disc of mass M and radius R A small disc of radius R 2is cut from this disc in such a way that the distance between...
- Q The deformation beyond elastic limit is called plasticity A Strain is a dimensionless quantity R Strain is internal force per unit area of a body
- Q In young s double slit experiment the central bright fringe can be identified 1 as it has greater intensity than the other bright fringe 2 as it is wider than...
- Q c The limits of visible spectrum are approximately 400nm to 700nm Find the angular width of the first order visible spectrum produced by a plane grating having 1500 lines per...
- Q A coin is placed at the edge of a horizontal disc rotating about a vertical axis through its centre with a uniform angular speed 2 rads The radius of the...
- Q rd Competitive Exams Mechanical Properties of Fluids 133 A cylinder of radius R full of liquid of density p is rotated about its axis at en rad s The increase...
- Q A crane lowers a 134 kg box from rest with a force that varies with time as shown in the graph below Att 10s what is the velocity in m...
- Q Two particles A and B are projected simultaneously with speed of 20 2 m s and 20 m s from top of two building of height 60m and 80m as...
- Q Light of wavelength 5890 4 falls on a double slit arrangement having separati d 0 2mm A thin lens of focal length f 1m is placed near the slits The...
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