List of top Questions asked in OJEE

What back emf is induced in a coil of self-inductance 0.008 H when the current in the coil is changing at the rate of 110 A/s?
If a copper wire carries a current of 80.0 mA, how many electrons flow past a given cross-section of the wire in 10.0 minutes?
A parallel-plate capacitor has plates of dimensions 2.0 cm by 3.0 cm separated by a 1.0 mm thickness of paper. The relative dielectric constant of paper is 3.7. Find its capacitance.
A triode valve has an anode resistance of 20,000 and an amplification factor of 20. The mutual conductance is:
The deviation produced by an equilateral prism, when a ray of light is incident on it, does not depend on:

Complete the following nuclear equation: \( \^{30}_{15}Si + ? \rightarrow ? + 1e^0 \)

Two coherent monochromatic light beams of intensity \( I \) and \( 4I \) are superimposed. The maximum and minimum possible intensities in the resulting beam are:
A concave lens forms the image of an object which is:
Current \( I \) flows through a conducting wire of radius \( a \). The magnetic field \( B \) at a distance \( r \) from the centre of the wire (where \( r>a \) and \( \mu \) is the permeability of free space) is:
Transfer of genetic material from one bacterium to another through contact is
The term episome refers to a type of
Teichoic acid is present in which cell component of bacteria
Which group includes protozoa, protistan algae and slime moulds
Enzymes present in gastric juice of stomach are
The term niche refers to
Nucleoid is
Interconnected flattened sacs of endoplasmic reticulum are called
Hypertonic urine formation is characteristic of kidneys of
Haemophilia is an example of
Epidermis is produced from
Which is not a characteristic feature of meristematic cells
Microfibrils are composed of
The condition in which anthers of all the stamens of a flower are united while filaments are free can be seen in
Aleurone layer is present in
Correct sequence of cardiac cycle is