Two point charges, \( q_1 = 3 \, \mu\text{C} \) and \( q_2 = -2 \, \mu\text{C} \), are placed 6 cm apart. The magnitude of the electric force between them is:

A coil has an inductance of \( L = 0.02 \text{ H} \) and the current is increasing at the rate of \( \frac{dI}{dt} = 200 \text{ A/s} \). The emf induced in it, \( \epsilon \), is:

8. An ammeter having internal resistance of \( 0.81 \, \Omega \) can read upto 1A. To convert it into an ammeter reading 0 - 10 A we have to connect :

Magnetic susceptibility \(X\) of a given material is \(- 0 . 5\). Identify the magnetic material.

To reduce the resonant frequency in an LCR series circuit with a generator.

Arrange the following electromagnetic waves in the ascending order of their wavelengths.
(A) Radio waves
(B) Gamma rays
(C) Infrared rays
(D) Ultraviolet rays
Choose the correct answer from the options given below:

A square loop is placed near a long straight current carrying wire as shown in figure. If the loop is moved away from the wire

Read the Passage carefully and answer the the questions
The DNA fragments can be separated by a technique known as gel electrophoresis. Since DNA fragments are negatively charged molecules, they can be separated by forcing them to move towards the anode under an electric field through a medium/matrix. The separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. The repeated amplification of DNA is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermus aquaticus). After completion of the biosynthetic stage, the product has to be subjected through a series of processes before it is ready for marketing as a finished product. The downstream processing and quality control testing vary from product to product. The convention for naming restriction enzymes is the first letter of the name comes from the genus and the second two letters come from the species of the prokaryotic cell from which they were isolated.
In agarose gel electrophoresis, DNA fragments move towards _______ under an electric field through a medium.

\(\int_0^2\left(x^2+1\right) d x\) is equal to

On connecting a device X in a series circuit with a battery and a resistor, a current passes through the circuit. On reversing the polarity of the battery, the current in the circuit drops to almost zero. The device X may be a

In angiosperms, the outer wall of ovary develops into :

The cell wall of a bacteria can be removed by treated it with enzyme:

A bag contains 4 red and 6 green balls. A ball is drawn at random, its colour is noted and is returned to the bag.
One additional ball of the colour drawn is put in the bag. Again a ball is then drawn from the bag. The probability of this ball to be of green colour is