An earthed conductor is placed near another positively charged conductor. The net charge acquired by the earthed conductor will be :

When a piece of metal is illuminated by monochromatic light of wavelength λ, the stopping potential for photoelectric current is 2.5 V0. When the same surface is illuminated by light of wavelength 1.5 λ, the stopping potential becomes V0. The value of threshold wavelength for photoelectric emission is:

Two equal and similar charges 3 cm apart in air repel each other with a force of 1.6 N. What will be the magnitude of each charge?

Choose the correct statements:
A. In uniform electric field E, the net force on electric dipole is zero.
B. The torque on dipole in electric field is \( \tau = PE \cos \theta \), where \( \theta \) is angle between \( \vec{P} \) and \( \vec{E} \).
C. In non uniform Electric field, when dipole moment P is parallel to E, the dipole has a net force in the direction of decreasing field.,
D. The direction of torque is perpendicular to both \( \vec{P} \) and \( \vec{E} \).
E. The net torque is zero if E is not uniform.
Choose the correct answer from the options given below:

A monochromatic visible light consists of

When we draw the variation of the potential energy of a pair of nucleons with their separations, then

Match List-I with List-II

List-I (Formula)	List-II (Physical quantity)
(A) \( neAv_d \)	(I) Mobility
(B) \(\frac{v_d}{E}\)	(II) Current
(C) \(\frac{n e^2 \tau}{m}\)	(III) Conductivity
(D) \(\frac{m}{n e^2 \tau}\)	(IV) Resistivity

Choose the correct answer from the options given below:

A conducting ring of radius r in a magnetic field varying at rate x has electric field intensity at any ring point as :

Which one of the following is NOT an example of commensalism?

Arrange the following cells according to their order of development in testis during spermatogenesis.
(A) Secondary spermatocytes
(B) Spermatids
(C) Primary spermatocytes
(D) Spermatogonia
Choose the correct answer from the options given below:

Two slits are kept 1 mm apart and the screen is placed 1.0 m away. What is the fringe separation when blue-green light of wavelength 500 nm is used ?

Read the passage carefully and answer the questions
Optically active polyhydroxy aldehydes or ketones or molecules which provide such units on hydrolysis are called carbohydrates. They can be broadly classified as monosaccharides, disaccharides and polysaccharides depending on their behavior towards hydrolysis. They are also classified as reducing or non-reducing sugars. Another class of biomolecules is proteins which are polymers of twenty different amino acids linked by peptide bonds. Amino acids can be classified as acidic, basic or neutral depending on the relative number of amino and carboxyl groups in their molecule. The essential amino acids cannot be synthesized by our body and hence must be provided through diet. Nucleic acids are the polymers of nucleotides which in turn consist of a base, pentose sugar and phosphate. There are two types of
nucleic acids namely, DNA and RNA which differ in the composition of sugar and a base
Which of the following is non-reducing sugar?

Which contrasting trait was not considered by Mendel in pea plant?