List of practice Questions

A motor
At the mid point along the length of a long solenoid, the magnetic field is equal to x. If the length of the solenoid is doubled and the current is reduced to half, the field at the new mid point will be nearest to
$1000$ drops of water of radius $1\,cm$ each carrying a charge of $10\, esu$ combine to form a single drop. The capacitance of combined drop increases
Which of the following bonds has the highest energy?
Boron compounds behave as Lewis acids, because of their
Two parallel wires carry electric current in same direction. The wires
In India electricity is supplied for domestic use at $220\, V$. It is supplied at $110 \,V$ in USA. If the resistance of a $60 \,W$ bulb for use in India is $R$, the resistance of a $60 \,W$ bulb for use in USA will be
An example of a non ohmic device is
Which of the following is the correct equation?
A particle starts with S.H.M. from the mean position as shown in the figure. Its amplitude is $A$ and its time period is $T$. At one time, its speed is half that of the maximum speed. What is this displacement?
What will be the longest wavelength line in Balmer series of spectrum?
Resistance of an ideal ammeter is
A red flower seen through a green glass looks
Four resistors of $100\,\Omega$ each are connected in the form of a square. Then the effective resistance along the diagonal point is
An electron in motion is associated with
80S ribosomes have two sub units which are:
There is no hole current in good conductors because:
Which type of DNA is found in bacteria?
Which one of the following statement about lichens is wrong?
What is the genetic material in influenza virus?
When an animal has both the characters of male and female, it is called
Coelom is found between
A force vector applied on a mass is represented as $\overrightarrow{F}=6\widehat i-8\hat j+10\hat k$ and accelerates with $1 m/s^2.$ What will be the mass of the body?
The isotonic solutions have equal:
The statement "algebraic sum of currents meeting at a node is zero" is