List of practice Questions

Experimental verification of the chromosomal theory of inheritance was done by:
The equation "E = hv" is proposed by
\(△ABC∼△XYZ;\ ∠C=60°;\ ∠B=75°\) then \(∠Z=\) ______.
If force acting on current carrying conductor inside a magnetic field is \(F=\frac {IlB}{\sqrt 2}\). Find the angle between plane of conductor and magnetic field intensity direction.
Match the following and select correct option:
Group-AGroup-B
(1)DYNAMO rule(A)Gauss
(2)Magnetic field(B)Fleming's right hand rule
(3)Electro magnet(C)Weber
(4)Magnetic flux(D)Microphone
P: The magnetic field lines always start from north pole.
Q: The magnetic field lines are open loops.
Which is not a application of the Faraday's law?
In an AC generator direction of current changes because of _____ .
Three conductors having resistance values 2 ohm, 3 ohm and 4 ohm are connected in parallel. Find equivalent resistance.
A bag contains 6 red balls, 12 green balls and 8 black balls. Find the probability that the ball drawn is either a black or a red ball.
If \(A=\frac {\pi}{4}\), then \((1+tanA) (1+tan^2A) (+tan^3A)=\)
If the angle of elevation of the Sun is 60°, then the ratio of a tree with its shadow is
If A = 45°, B = 60° then sin A+ cos B
If A, B, C, D are angles of a cyclic quadrilateral, then sin A + sin B - sin C - sin D =?
If a coin is tossed 3 times, then the probability of getting at least one head is
If two dice are rolled simultaneously then the probability that the numbers on them are different is
The median of the marks scored by 100 students in a 25 marks Unit test is
Marks0-55-1010-1515-2020-25
No. of students101842137
1 radian= _____ .
In the figure, \(∠ACB\)_____ .
In the figure,∠ACB
In the figure x= _____ .
In the figure x
The radius of the sphere is increased by 100%, the volume of the resulting sphere is increased by
To find out the slant height of a cone, we use ______ Theorem.
A line which intersects the given circle at two distinct points is called
\(△ABC∼△PQR\), then \(y+z =\) ______ .
△ABC∼△PQR then y+z =__.
Angle in a major segment is