Jharkhand Board Physics Magnetic effect of current MCQs Very Important Verma Guess Paper | Day 1

The distribution of electrons among molecular orbitals is called the electronic configuration of the molecule which provides us the following very important informations about the molecule. (A)Stability of molecule : The molecule is stable if number of bonding moleculer orbital electrons (N_b) is greater than the number of antibonding molecular orbital electrons (N_a) . (B) Bond order : Bond order =1/2(N_b-N_a) A positive bond order means a stable molecule while a negative or zero bond order means an unstable molecule. ( C)Nature of the bond : Bond order 1,2 and 3 corresponds to single , double and triple bonds respectively. (D)Bond length: Bond length decreases as bond order increases. (E)Magnetic nature: Molecular orbitals in a molecule are doubly occupied , the substance is diamagnetic and if one or more molecular orbitals are singly occupied, it is paramagnetic. Which of the following statements is incorrect ?

The origin of acidity and basicity in organic compound is great interest and provides an extensive comparison. Among hydrocarbons % a character is taken in aC Count while to decide the acidity, in simple aliphatic acids, more the number of alkyl groups, (+1 effect) less is the acidity & more the (-1 effect) groups larger the acidity and vice-versa in the case of simple alphatic bases. Benzoic acid is more stronger than carboxylic acid as benzoate ion is stablised more by resonance. Aromatic amines are less basic than apiphatic amine as the electron pair is less available in case of aromatic amines. The presence of solvent also plays a very important role and at time governs the order too. Among the following compounds the strongest acid is

The origin of acidity and basicity in organic compound is great interest and provides an extensive comparison. Among hydrocarbons % a character is taken in aC Count while to decide the acidity, in simple aliphatic acids, more the number of alkyl groups, (+1 effect) less is the acidity & more the (-1 effect) groups larger the acidity and vice-versa in the case of simple alphatic bases. Benzoic acid is more stronger than carboxylic acid as benzoate ion is stablised more by resonance. Aromatic amines are less basic than apiphatic amine as the electron pair is less available in case of aromatic amines. The presence of solvent also plays a very important role and at time governs the order too. In the following compounds, the oreder of basicity

The origin of acidity and basicity in organic compound is great interest and provides an extensive comparison. Among hydrocarbons % a character is taken in aC Count while to decide the acidity, in simple aliphatic acids, more the number of alkyl groups, (+1 effect) less is the acidity & more the (-1 effect) groups larger the acidity and vice-versa in the case of simple alphatic bases. Benzoic acid is more stronger than carboxylic acid as benzoate ion is stablised more by resonance. Aromatic amines are less basic than apiphatic amine as the electron pair is less available in case of aromatic amines. The presence of solvent also plays a very important role and at time governs the order too. Which of the following is most acidic

Statement-1 In the arrangement shown, the hoop carries a constant current. This hoop can remain stationary under the effect of magnetic field of the bar magnet Statement-2 When a magnetic dipole is placed in a non-uniform magnetic field. It experiences a force opposite to direction of external magnetic field at its centre

A brilliant student of physics developed a magnetic balance to weight objects. The mass m to be measured is hung from the center the bar. Bar is kept in a uniform magnetic field of 1.5 T directed into the plane of the figure. Battery voltage can be adjusted to vary the current in the circuit. The horizontal bar shown is 60cm long and is made of extremly light weight material. It is connected to the battery via a resistance. There is no tension in the supporting wired. The magnetic force only supports the hanging weight. If V = 150 V , what is the maximum mass m ?

A brilliant student of physics developed a magnetic balance to weight objects. The mass m to be measured is hung from the center the bar. Bar is kept in a uniform magnetic field of 1.5 T directed into the plane of the figure. Battery voltage can be adjusted to vary the current in the circuit. The horizontal bar shown is 60cm long and is made of extremly light weight material. It is connected to the battery via a resistance. There is no tension in the supporting wired. The magnetic force only supports the hanging weight. Which point of battery is positive?

The origin of acidity and basicity in organic compound is great interest and provides an extensive comparison. Among hydrocarbons % a character is taken in aC Count while to decide the acidity, in simple aliphatic acids, more the number of alkyl groups, (+1 effect) less is the acidity & more the (-1 effect) groups larger the acidity and vice-versa in the case of simple alphatic bases. Benzoic acid is more stronger than carboxylic acid as benzoate ion is stablised more by resonance. Aromatic amines are less basic than apiphatic amine as the electron pair is less available in case of aromatic amines. The presence of solvent also plays a very important role and at time governs the order too. Amongst the following the most basic compound is -

The origin of acidity and basicity in organic compound is great interest and provides an extensive comparison. Among hydrocarbons % a character is taken in aC Count while to decide the acidity, in simple aliphatic acids, more the number of alkyl groups, (+1 effect) less is the acidity & more the (-1 effect) groups larger the acidity and vice-versa in the case of simple alphatic bases. Benzoic acid is more stronger than carboxylic acid as benzoate ion is stablised more by resonance. Aromatic amines are less basic than apiphatic amine as the electron pair is less available in case of aromatic amines. The presence of solvent also plays a very important role and at time governs the order too. Which of the following orders regarding acid strength is correct ?

Two long parallel wires carry currents in opposite direction as shown. Points A and D lie in the same plane as the wires. The magnetic field at A and D is into the plane of the paper, with intensity B_(A) and B_(D) respectively. If (B_(A))/(B_(D))=7/5 , the value of (I_(1))/(I_(2)) is ____________________.