If in a circular coil A of radius R, current I is flowing and in another coil B of radius 2R a current 2I is flowing, then what will be the ratio of the magnetic fields, B_{A} and B_{B}, produced by them?
If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter a
Find the binomial distribution for which the mean is 4 and vanance 3
A card is drawn at random from a wellshuffled pack of 52 cards. Find the probability that
it is neither an ace nor a king
Find the probability of at most two tails or at least two heads in a toss of 3 coins
Four cards are drawn randomly from a well shuffled pack of 52 Cards. Fip probability of getting 3 diamonds and one spade
A pair of dice is thrown 4 times. If getting a doublet is considered a success, find th probability distribution of number of success?
Two electric bulbs marked 25 W220 V and 100 W220 V are connected in series to a 440 V supply. Which of the bulbs will fuse?
From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row on a shelf so that the dictionary is always in the middle. Then the number of such arrangements is
The area of the region bounded by the parabola (y – 2)2 = x – 1, the tangent to the parabola at the point (2, 3) and the xaxis is
The degree and order of the diffrential equation of the family of the parabolas whose is xaxis are respectively
The order and degree of the diffrential equation are
The Solution of the equation
if
The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and 200 V lamp when not in use?
Two voltameters, one of copper and another of silver, are joined in parallel. When a total charge q flows through the voltmeters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are z_{1} and z_{2} respectively the charge which flows through the silver voltameter is
A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
The electrochemical equivalent of metal is 3.3 × 10^{7} kg per coulomb. What will be the mass of the metal liberated at the cathode when a 3 A current is passed for 2 seconds?
An electric bulb is rated 220 volt 100 watt. What will be the power consumed by it when operated on 110 volt?
A thermocouple is made from two metals, antimony and bismuth. If one junction of the couple is kept hot and the other is kept cold then, an electric current will
An energy source will supply a constant current into the load if its internal resistance is
The thermo emf of a thermocouple varies with the temperature of the hot junction as in volt where the ratio a/b is 700°C. If the cold junction is kept at 0°C, then the neutral temperature is
Time taken by a 836 W heater to heat one litre of water from 10°C to 40°C is
A 220 volt, 1000 watt bulb is connected across a 110 volt mains supply. What will be the power consumed?
The negative Zn pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 minutes. If the electrochemical equivalent of Zn and Cu are 32.5 and 31.5 respectively, the increase in the mass of the positive Cu pole in this time is
The thermo e.m.f. of a thermocouple is at room temperature. A galvanometer of 40 ohm resistance, capable of detecting current as low as 10^{5} A, is connected with the thermocouple. The smallest temperature difference that can be detected by this system is
The mass of a product liberated on anode in an electrochemical cell depends on
Note: where t is the time period for which the current is passed.
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at
Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?
Which base is present in RNA but not in DNA?
Identify the correct statement regarding enzymes
The reason for double helical structure of DNA is operation of
Complete hydrolysis of cellulose gives
The functional group, which is found in amino acid is
RNA is different from DNA because RNA contains
The secondary structure of a protein refers to
The pyrimidine bases present in DNA are
The term anomers of glucose refers to
The figure shows the velocity and acceleration of a point like body at the initial moment of its motion. The acceleration vector of the body remains constant. The minimum radius of curvature of trajectory of the body is?
The area of region in first quadrant in which points are nearer to the origin then to the line x = 3?
Two friends have equal number of sons. There are 3 tickets for a cricket match which are to be distributed among the sons. The probability that two tickets go to the sons of one and one tickets goes to the sons of other is 6 . Then total number of boys is equal to (sum of son of each friend).
If the equation x4 –4x^3 +ax^2 +bx+1=0has four positive roots then
Find the coefficient of x^5 in the expansion of (2 – x + 3x^2)^6
Find the point P on the line 2x+3y+1=0 such that PA–PB is maximum where A is(2,0) and B is (0, 2)
A point on the hypotenuse of a triangle is at distance a and b from the side of the triangle then minimum length of the hypotenuse is
A wire when connected to 220 V mains supply has power dissipation P_{1}. Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is P_{2}. Then what will be P_{2} : P_{1 }?
If in the circuit, power dissipation is 150 W, then R is
Which one of the following properties is not shown by NO ?

(1) It combines with oxygen to form nitrogen dioxide

(2) It′s bond order is 2.5

(3) It is diamagnetic in gaseous state

(4) It is a neutral oxide
When a rubberband is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx2 where a and b are constants. The work done in stretching the unstretched rubberband by L is :