Maths-
General
Easy
Question
If the points 
and 
are the extremities of a focal chord of the parabola 
, then
The correct answer is:
Equation of focal chord for the parabola 
passes through the point 
and 
Þ 
Þ 
Þ 
If this is focal chord, so it would passes through focus (a,0).
Þ
Þ
, \uv+1=0.
Related Questions to study
Maths-
The locus of the middle point of the intercept of the tangents drawn from an external point to the ellipse 
between the co-ordinates axes, is
The locus of the middle point of the intercept of the tangents drawn from an external point to the ellipse between the co-ordinates axes, is
Maths-General
Physics-
An isolated north pole of mass 2gm and pole strength 10 A-m is kept in a uniform magnetic field of induction 
. The force experienced by the pole is
An isolated north pole of mass 2gm and pole strength 10 A-m is kept in a uniform magnetic field of induction . The force experienced by the pole is
Physics-General
Physics-
A short bar magnet placed at a certain distance from a deflection magnetometer in tan A position produces a deflection of 60° The magnet is now cut into three equal pieces. If one piece is kept at the same distance in 'tan A' position from the deflection magnetometer, then the deflection produced is
A short bar magnet placed at a certain distance from a deflection magnetometer in tan A position produces a deflection of 60° The magnet is now cut into three equal pieces. If one piece is kept at the same distance in 'tan A' position from the deflection magnetometer, then the deflection produced is
Physics-General
Physics-
A short magnet produces a deflection of 45° in a deflection magnetometer in TanB position, when placed at a distance of 10 cm from the needle. Where should the same bar magnet be placed in Tan A position of the magnetometer to produce same deflection 45°
A short magnet produces a deflection of 45° in a deflection magnetometer in TanB position, when placed at a distance of 10 cm from the needle. Where should the same bar magnet be placed in Tan A position of the magnetometer to produce same deflection 45°
Physics-General
Physics-
A cell of emf 1.6 V is connected across a potentiometer wire of length 500 cm. The cell has negligible resistance. A thermo couple whose cold junction is at 
and hot junction at 
is connected in the secondary circuit. The balancing length is found to be 125 cm. Find the thermo emf per degree centigrade difference of temperature of the junctions.
A cell of emf 1.6 V is connected across a potentiometer wire of length 500 cm. The cell has negligible resistance. A thermo couple whose cold junction is at and hot junction at is connected in the secondary circuit. The balancing length is found to be 125 cm. Find the thermo emf per degree centigrade difference of temperature of the junctions.
Physics-General
Physics-
Two wires A and B of same material and mass have their lengths in the ratio 1:2. On connecting them separately to the same source, the rate of heat dissipation in B is found to be 5 W. The rate of heat dissipation in A is
Two wires A and B of same material and mass have their lengths in the ratio 1:2. On connecting them separately to the same source, the rate of heat dissipation in B is found to be 5 W. The rate of heat dissipation in A is
Physics-General
Physics-
In the following circuit, 
resistor develops 45 J/s due to current flowing through it. The power developed across 
resistor is
In the following circuit, resistor develops 45 J/s due to current flowing through it. The power developed across resistor is
Physics-General
Physics-
In a thermo couple, thermo emf produced is 
per one degree difference of temperature between the two junctions. When the cold junction of such thermocouple is at 20°C, the thermo emf is 0.3mV. The temperature of the hot junction is
In a thermo couple, thermo emf produced is per one degree difference of temperature between the two junctions. When the cold junction of such thermocouple is at 20°C, the thermo emf is 0.3mV. The temperature of the hot junction is
Physics-General
Physics-
What is the ratio of heat generated in R and 2R
What is the ratio of heat generated in R and 2R
Physics-General
Physics-
A long resistance wire is divided into 2n parts. Then n parts are connected in series and other ' n ' parts in parallel separately. Both combinations are connected to identical supplies. Then the ratio of heat produced in series to parallel combinations will be
A long resistance wire is divided into 2n parts. Then n parts are connected in series and other ' n ' parts in parallel separately. Both combinations are connected to identical supplies. Then the ratio of heat produced in series to parallel combinations will be
Physics-General
Physics-
Two unknown resistances X and Y are connected to left and right gaps of a meter bridge and the balancing point is obtained at 80 cm from left. When a 
resistance is connected to parallel to X, the balancing point is 50 cm from left The values of X and Y respectively are
Two unknown resistances X and Y are connected to left and right gaps of a meter bridge and the balancing point is obtained at 80 cm from left. When a resistance is connected to parallel to X, the balancing point is 50 cm from left The values of X and Y respectively are
Physics-General
Physics-
A balanced Wheatstone bridge is shown the values of currents 
and 
are
A balanced Wheatstone bridge is shown the values of currents and are
Physics-General
Physics-
A current of 3 A flows in a circuit the potential difference between points A and D is
A current of 3 A flows in a circuit the potential difference between points A and D is
Physics-General
Physics-
The value of current in the given circuit is
The value of current in the given circuit is
Physics-General
Physics-
The current through resister in the figure is approximately
The current through resister in the figure is approximately
Physics-General
