Physics-
General
Easy
Question
Two cars A and B moving on two straight tracks inclined at an angle 60° heading towards the crossing initially their positions are as shown in the figure. Both cars have same speed. Minimum seperation between them during their motion will be
- 10 km
- 5 km.
The correct answer is:
LetconsiderBasobserver
dmin = 10 sin 60 km =
Related Questions to study
Physics-
A particle is projected with speed 30m/s at angle 22.5° with horizontal from ground as shown. AB and CD are parallel to y-axis and B is highest point of trajectory of particle. CD/AB is
A particle is projected with speed 30m/s at angle 22.5° with horizontal from ground as shown. AB and CD are parallel to y-axis and B is highest point of trajectory of particle. CD/AB is
Physics-General
Physics-
Each of the two block shown in the figure has mass m. The pulley is smooth and the coefficient of friction for all surfaces in contact is m. A constant horizontal force P applied in two cases shown in such a way that block A start just sliding then the value of minimum force P in case-I and case-II is :
Each of the two block shown in the figure has mass m. The pulley is smooth and the coefficient of friction for all surfaces in contact is m. A constant horizontal force P applied in two cases shown in such a way that block A start just sliding then the value of minimum force P in case-I and case-II is :
Physics-General
Physics-
Thefigureshowstwoequal,positivecharges,eachofmagnitude50°C,fixedatpoints(3,0)m and(–3,0)m respectively. A charge–50OC,movingalongnegativey–axishasakineticenergyof4Jattheinstantitcrosses point(0,4)m.Determinethepositionofthischargewherethedirectionofitsmotionreversesforthefirsttime after crossing this point (neglect gravity).
Thefigureshowstwoequal,positivecharges,eachofmagnitude50°C,fixedatpoints(3,0)m and(–3,0)m respectively. A charge–50OC,movingalongnegativey–axishasakineticenergyof4Jattheinstantitcrosses point(0,4)m.Determinethepositionofthischargewherethedirectionofitsmotionreversesforthefirsttime after crossing this point (neglect gravity).
Physics-General
Physics-
In the figure shown an infinitely long wire of uniform linear charge density is kept perpendicular to the plane of figure such that it extends upto infinity on both sides of the paper. Find the electro static force on a semicircular ringkeptsuchthatitsgeometricalaxiscoincideswiththewire.Thesemicircularringhasauniformlinearcharge density
In the figure shown an infinitely long wire of uniform linear charge density is kept perpendicular to the plane of figure such that it extends upto infinity on both sides of the paper. Find the electro static force on a semicircular ringkeptsuchthatitsgeometricalaxiscoincideswiththewire.Thesemicircularringhasauniformlinearcharge density
Physics-General
Physics-
An aluminium ring B faces an electromagnet A. The current I through A can be altered
An aluminium ring B faces an electromagnet A. The current I through A can be altered
Physics-General
Physics-
In the diagram shown if a bar magnet is moved along the common axis of two single turn coils A and B in the direction of arrow
In the diagram shown if a bar magnet is moved along the common axis of two single turn coils A and B in the direction of arrow
Physics-General
Physics-
Lenz’s law applies to
Lenz’s law applies to
Physics-General
Physics-
A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will
A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will
Physics-General
Physics-
Lenz's law gives
Lenz's law gives
Physics-General
Physics-
A 50 turns circular coil has a radius of 
, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field 
increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f. in the coil is
A 50 turns circular coil has a radius of , it is kept in a magnetic field acting normal to the area of the coil. The magnetic field increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f. in the coil is
Physics-General
Physics-
When a magnet is pushed in and out of a circular coil C connected to a very sensitive galvanometer G as shown in the adjoining diagram with a frequency 
, then
When a magnet is pushed in and out of a circular coil C connected to a very sensitive galvanometer G as shown in the adjoining diagram with a frequency , then
Physics-General
Physics-
As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil is 
and 
respectively. If the speed of the magnet is doubled, the incorrect statement is
As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil is and respectively. If the speed of the magnet is doubled, the incorrect statement is
Physics-General
Physics-
A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be
A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be
Physics-General
Physics-
The length of a magnet is large compared to it's width and breadth. The time period of its oscillation in a vibration magnetometer is T. The magnet is cut along it’s length into six parts and these parts are then placed together as shown in the figure. The time period of this combination will be
The length of a magnet is large compared to it's width and breadth. The time period of its oscillation in a vibration magnetometer is T. The magnet is cut along it’s length into six parts and these parts are then placed together as shown in the figure. The time period of this combination will be
Physics-General
Physics-
Two short magnets of magnetic moment 1000 
are placed as shown at the corn ers of a square of side 10 cm. The net magnetic induction at P is
Two short magnets of magnetic moment 1000 are placed as shown at the corn ers of a square of side 10 cm. The net magnetic induction at P is
Physics-General
