Physics-
General
Easy
Question
A point source causes photoelectric effect from a small metal plate Which of the following curves may represent the saturation photocurrent as a function of the distance between the source and the metal?
- a
- b
- c
- d
The correct answer is: d
Related Questions to study
physics-
One of the following figures respesents the variation of particle momentum with associated de Broglie wavelength
a) 
b) 
c) 
One of the following figures respesents the variation of particle momentum with associated de Broglie wavelength
a)
b)
c)
physics-General
physics-
Two circular discs A and B with equal radii are blackened. They are heated to some temperature and are cooled under identical conditions. What inference do you draw from their cooling curves?
Two circular discs A and B with equal radii are blackened. They are heated to some temperature and are cooled under identical conditions. What inference do you draw from their cooling curves?
physics-General
physics-
Which of the curves in figure represents the relation between Celsius and Fahrenheit temperatures
Which of the curves in figure represents the relation between Celsius and Fahrenheit temperatures
physics-General
Maths-
The area of circle centred at (1, 2) and passing through (4, 6) is
The area of a circle is the space occupied by the circle in a two-dimensional plane. Area of circle = πr2 (π = 22/7).
The area of circle centred at (1, 2) and passing through (4, 6) is
Maths-General
The area of a circle is the space occupied by the circle in a two-dimensional plane. Area of circle = πr2 (π = 22/7).
physics-
Three rods of same dimensions are arranged as shown in figure. They have thermal conductivities 
and 
. The points 
and 
are maintained at different temperatures for the heat to flow at the same rate along 
and 
then which of the following options is correct
Three rods of same dimensions are arranged as shown in figure. They have thermal conductivities and . The points and are maintained at different temperatures for the heat to flow at the same rate along and then which of the following options is correct
physics-General
physics-
In the following diagram if 
then 
In the following diagram if then
physics-General
physics-
The maximum kinetic energy (Ek ) of emitted photoelectrons against frequency v of incident radiation is plotted as shown in fig The slope of the graph is equal to
The maximum kinetic energy (Ek ) of emitted photoelectrons against frequency v of incident radiation is plotted as shown in fig The slope of the graph is equal to
physics-General
maths-
In centre of the triangle formed by the lines y = x, y = 3x and y = 8 – 3x is
In centre of the triangle formed by the lines y = x, y = 3x and y = 8 – 3x is
maths-General
physics-
A lamp rated at 100 cd hangs over the middle of a round table with diameter 3 m at a height of 2 m. It is replaced by a lamp of 25 cd and the distance to the table is changed so that the illumination at the centre of the table remains as before. The illumination at edge of the table becomes X times the original. Then X is
A lamp rated at 100 cd hangs over the middle of a round table with diameter 3 m at a height of 2 m. It is replaced by a lamp of 25 cd and the distance to the table is changed so that the illumination at the centre of the table remains as before. The illumination at edge of the table becomes X times the original. Then X is
physics-General
physics-
Five lumen/watt is the luminous efficiency of a lamp and its luminous intensity is 35 candela. The power of the lamp is
Five lumen/watt is the luminous efficiency of a lamp and its luminous intensity is 35 candela. The power of the lamp is
physics-General
physics-
Lux is equal to
Lux is equal to
physics-General
physics-
A 60 watt bulb is hung over the center of a table 
at a height of 3 m. The ratio of the intensities of illumination at a point on the centre of the edge and on the corner of the table is
A 60 watt bulb is hung over the center of a table at a height of 3 m. The ratio of the intensities of illumination at a point on the centre of the edge and on the corner of the table is
physics-General
maths-
If f(x) is a polynomial of degree five with leading coefficient one such that f(1)=12,f(2)=22,f(3)=32,f(4)=42,f(5)=52 then
If f(x) is a polynomial of degree five with leading coefficient one such that f(1)=12,f(2)=22,f(3)=32,f(4)=42,f(5)=52 then
maths-General
maths-
If f(x) = ax2+ bx + c such that f(p) + f(q) = 0 where a
0 ; p , q
R then number of real roots of equation f(x) = 0in interval [p, q] is
If f(x) = ax2+ bx + c such that f(p) + f(q) = 0 where a0 ; p , qR then number of real roots of equation f(x) = 0in interval [p, q] is
maths-General
maths-
If f(x) is a differentiable function satisfying f(x+ y)= f(x)f(y) 
x, y R and f'(0)=2 then f(x)=
If f(x) is a differentiable function satisfying f(x+ y)= f(x)f(y) x, y R and f'(0)=2 then f(x)=
maths-General
