List of practice Questions

A bus moving along a straight highway with speed of 72 km/h is brought to halt within 4s after applying the brakes. The distance travelled by the bus during this time (Assume the retardation is uniform) is _______m.

A 90 kg body placed at \( 2R \) distance from the surface of the earth experiences gravitational pull of:
(\( R \) = Radius of Earth, \( g = 10 \, \text{ms}^{-2} \)).

Applying the principle of homogeneity of dimensions, determine which one is correct. Where \( T \) is the time period, \( G \) is the gravitational constant, \( M \) is the mass, and \( r \) is the radius of the orbit.

A charge q is placed at the center of one of the surface of a cube. The flux linked with the cube is :-

A sample of gas at temperature \( T \) is adiabatically expanded to double its volume. Adiabatic constant for the gas is \( \gamma = \frac{3}{2} \). The work done by the gas in the process is (\( \mu = 1 \) mole):

According to Bohr's theory, the moment of momentum of an electron revolving in the 4^th orbit of a hydrogen atom is:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Number of photons increases with increase in frequency of light.
Reason (R): Maximum kinetic energy of emitted electrons increases with the frequency of incident radiation.
In the light of the above statements, choose the most appropriate answer from the options given below:

A 2 kg brick begins to slide over a surface which is inclined at an angle of \( 45^\circ \) with respect to the horizontal axis. The coefficient of static friction between their surfaces is:

An electric bulb rated 50 W – 200 V is connected across a 100 V supply. The power dissipation of the bulb is :

A body of m kg slides from rest along the curve of vertical circle from point A to B in friction less path. The velocity of the body at B is :

(Given, \( R = 14 \, \text{m}, \, g = 10 \, \text{m/s}^2 \, \text{and} \, \sqrt{2} = 1.4 \))

Given below are two statements :
Statement I : The contact angle between a solid and a liquid is a property of the material of the solid and liquid as well.
Statement II : The rise of a liquid in a capillary tube does not depend on the inner radius of the tube.
In the light of the above statements, choose the correct answer from the options given below :

Write IUPAC names of the following compounds:
Structure:

Show by making a diagram for the magnetic lines of force around a bar magnet.

Choose the correct alternative by matching the physical quantities in column (B) with the units in column (A): \[ \begin{array}{|l|l|} \hline \textbf{A} & \textbf{B} \\ \hline (1) \text{Ohm} & (ii) \text{Electric resistance} \\ \hline (2) \text{Watt} & (iii) \text{Electric power} \\ \hline (3) \text{Ampere} & (i) \text{Electric current} \\ \hline (4) \text{Volt} & (iv) \text{Electric potential difference} \\ \hline \end{array} \]

What is short-sightedness (myopia)? Explain with a ray diagram. This defect is corrected by which type of lens?

Explain the difference between magnet and current carrying solenoid.

Differentiate between self-pollination and cross-pollination.

Write down four differences between producers and consumers.

The structural formula of methane is:

The direction of the force acting on the electron entering perpendicular to the magnetic field as shown in the figure, will be:

What is vegetative propagation? Describe it with a suitable example and diagrams.

In the circuit given below, five resistances of \(10 \Omega\), \(40 \Omega\), \(20 \Omega\), \(30 \Omega\), and \(60 \Omega\) are connected as shown to a battery of 18 volts.
Potential difference between points A and B

In the circuit given below, five resistances of \(10 \Omega\), \(40 \Omega\), \(20 \Omega\), \(30 \Omega\), and \(60 \Omega\) are connected as shown to a battery of 18 volts.
Total resistance of the circuit

In the circuit given below, five resistances of \(10 \Omega\), \(40 \Omega\), \(20 \Omega\), \(30 \Omega\), and \(60 \Omega\) are connected as shown to a battery of 18 volts.
Total current flowing in the circuit