Description : Two copper wires A and B of equal masses are taken. The length of A is double the length of B. If the resistance of wire A is `160 Omega `, then calcu
Last Answer : Two copper wires A and B of equal masses are taken. The length of A is double the length of ... Omega `, then calculate the resistance of the wire B.
Description : A wire of resistanc e`9Omega` is broken in two parts. The length ratio being `1:2`. The two pieces are connected in parallel. The net resistance will
Last Answer : A wire of resistanc e`9Omega` is broken in two parts. The length ratio being `1:2`. The two pieces are ... 2Omega` B. `3Omega` C. `4Omega` D. `6Omega`
Description : The greatest induced EMF will occur in a straight wire moving at constant speed through a uniform magnetic field when the angle between the direction of the wire's motion and the direction of the magnetic field is w) 0 degrees x) 30 degrees y) 60 degrees z) 90 degrees
Last Answer : ANSWER: Z -- 90 DEGREES
Description : In the mass spectrograph, two positively charged ions having the same velocity pass through a slit and enter a uniform magnetic field at right angles to their initial velocities. The ions will NOT be ... charges and their masses are equal z) the ratios of their charges to their masses are equal
Last Answer : ANSWER: Z -- THE RATIOS OF THEIR CHARGES TO THEIR MASSES ARE EQUAL
Description : Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potentail di
Last Answer : Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil ... the same? A. 3 B. 4 C. 6 D. 2
Description : The length of a wire is increased by 1 mm on the application of a certain load. In a wire of the same material but of twice the length and half the radius, the same force will produce an elongation of (a) 0.5 mm (b) 2 mm (c) 4 mm (d) 8 mm
Last Answer : (d) 8 mm
Description : Assertion : Two resistance wires shown in figure are of same material. They have equal length. More heat is generated in wire A. Reason : In series `H
Last Answer : Assertion : Two resistance wires shown in figure are of same material. They have equal length. More ... . If Assertion is false but Reason is true.
Description : A uniform wire is cut into four segments. Each segment is twice as long as the earlier segment. If the shortest segment has a resistance of `4 Omega`,
Last Answer : A uniform wire is cut into four segments. Each segment is twice as long as the earlier segment. ... Omega`, find the resistance of the original wire.
Description : The masses of the three wires of copper are in the ratio `5:3:1` and their lengths are in the ratio `1:3:5`. The ratio of their electrical resistances
Last Answer : The masses of the three wires of copper are in the ratio `5:3:1` and their lengths are in the ratio `1:3:5`. The ... ):15:1` C. `1:15:125` D. `1:3:5`
Description : A circular flexible loop of wire of radius r carrying a current I is placed in a uniform magnetic field B . If B is doubled, then tension in the loop
Last Answer : A circular flexible loop of wire of radius r carrying a current I is placed in a uniform magnetic field ... is doubled C. is halved D. becomes 4 times
Description : An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged paricle q moving along th
Last Answer : An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A ... `qv(mu_(0)i)/(a)` D. zero
Description : To protect wiring from excessive passing of current is A. voltmeter B. fuse C. galvanometer D. resistanc
Last Answer : fuse
Description : An instrument has two strings. Both have the same length and are uniform. One of the strings is under twice as much tension as the other and also twice the mass of the other. Then which of ... d) Both strings vibrate with the same frequency and have the same wave-length and the same wave velocity.
Last Answer : Ans:(d)
Description : Two charged particles have charges and masses in the ratio `2:3` and `1:4` respectively. If they enter a uniform magnetic field and move with the same
Last Answer : Two charged particles have charges and masses in the ratio `2:3` and `1:4` respectively. If they enter a uniform magnetic ... `1:4` C. `3:5` D. `1:6`
Description : Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of (A) 1 : 1 (B) 1 : 2 (C) 2 : 1 (D) 1 : 4
Last Answer : Option A
Description : Two wires A and B of the same material have their lengths in the ratio `1 : 5` and diameters in the ratio ` 3 : 2`. If the resistance of the wire B is
Last Answer : Two wires A and B of the same material have their lengths in the ratio `1 : 5` and diameters in ... `180 Omega`, find the resistance of the wire A.
Description : If two wires of the same material have the same thickness but different length the blank wire will have greater resistance?
Last Answer : Materials
Description : A composite wire is prepared by joining a tungsten wire and steel wire end to end. Both the wires are of the same
Last Answer : A composite wire is prepared by joining a tungsten wire and steel wire end to end. Both the wires are of ... 1011 Pa, YTungsten = 4.11 1011 Pa]
Description : Four wires of the same material and dimensions as under are stretched by a load of same magnitude separately. Which of them will be elongated maximum? (a) wire of 3m length and 1.5 mm diameter (b) ... and 2mm diameter (c) wire of 2m length and 2mm diameter (d) wire of 1m length and 1mm diameter
Last Answer : Ans:(a)
Description : In prestressing work, if more than one wire or strand is included in the same duct, why should all wires/strands be stressed at the same time?
Last Answer : If wires/strands are stressed individually inside the same duct, then those stressed strand/wires will bear against those unstressed ones and trap them. Therefore, the friction of the trapped wires is high and is undesirable.
Description : Two ions having masses in the ratio `1 : 1` and charges `1 : 2` are projected into uniform magnetic field perpendicular to the field with speeds in th
Last Answer : Two ions having masses in the ratio `1 : 1` and charges `1 : 2` are projected into uniform magnetic field perpendicular ... `2:3` C. `3:1` D. `1:4`
Description : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.
Last Answer : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.
Description : A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists a uniform magnetic field of magnitude B
Last Answer : A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists ... sqrt(3)IB` C. `sqrt(2I) lB` D. 2Ilb
Description : Two bodies of equal mass are moving in circular paths at equal speed. The first body moves in a circle whose radius is twice as great as that of the second. The ratio of the centripetal or radial acceleration of the first body to that of the second is: w) 1 to 4 x) 1 to 3 y) 1 to 2 z) 1 to 1
Last Answer : ANSWER: Y -- 1 TO 2
Description : Frame the formula: The lateral surface area of a cylinder S is equal to twice the product of `pi`, radius (r) and height (h) of the cylinder.
Last Answer : Frame the formula: The lateral surface area of a cylinder S is equal to twice the product of `pi`, radius (r) ... `S=pirh` C. `2S=pirh` D. `S=2pirh`
Description : How far away from the surface of the Earth does the acceleration due to gravity become ½ of its value at the surface of Earth? It is at a (a) Distance equal to radius (b) Distance equal to half the radius (c) Distance equal to twice the radius (d) Distance equal to 0.414 times the radius
Description : The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to (A) Half the depth (B) Half the breadth (C) Twice the depth (D) Twice the breadth
Last Answer : Answer: Option A
Description : The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. (1) greater than the weight when the person is stationary (2) twice the weight when the person ... than the weight when the person is stationary (4) same as the weight when the person is stationary
Last Answer : (3) less than the weight when the person is stationary
Description : Two identical conducting wires `AOB and COD` are placed at right angles to each other. The wire `AOB` carries an electric current `I_(1) and COD` carr
Last Answer : Two identical conducting wires `AOB and COD` are placed at right angles to each other. The wire `AOB` carries an electric ... )^(2)+I_(2)^(2))^(1//2)`
Description : Currents of `10A, 2A` are passed through two parallel wires `A` and `B` respectively in opposite directions. If the wire `A` is infinitely long and th
Last Answer : Currents of `10A, 2A` are passed through two parallel wires `A` and `B` respectively in opposite directions. If the ... `4xx10^(-7)N` D. `8xx10^(-7)N`
Description : Two infinitely long, thin, insulated, straight wires lie in the x-y plane along the x- and y- axis respectively. Each wire carries a current I, respec
Last Answer : Two infinitely long, thin, insulated, straight wires lie in the x-y plane along the x- and y- axis respectively. Each ... x C. y = x-1 D. y = -x+1
Description : Two resistance wires on joining in parallel the resultant resistance is ohms `(6)/(5)` ohms. One of the wire breaks, the effective resistance is 2 ohm
Last Answer : Two resistance wires on joining in parallel the resultant resistance is ohms `(6)/(5)` ohms. One of the wire ... ` C. `(6)/(5)Omega` D. `3Omega`
Description : Which of the following statements is correct concerning the circuits in a sound powered telephone system? A. The ringing circuit is composed of only one common wire to ground. B. The common ... connected to each station. D. The talking and calling circuits are electrically dependent upon each other.
Last Answer : Answer: B
Description : The local loop of the telephone system is understood to be A. a single piece of wire connecting the subscriber's telephone set to another telephone set in an adjacent room B. a two-wire or four- ... a facsimile machine to a computer D. a group of wires connecting a telephone set to a modem
Last Answer : B. a two-wire or four-wire communication circuit between the customer’s premise and central office
Description : `1kg` piece of copper is drawn into a wire `1mm` thick and another piece into a wire `2mm` thick. Compare the resistance of these wires.
Last Answer : `1kg` piece of copper is drawn into a wire `1mm` thick and another piece into a wire `2mm` thick. Compare the resistance of these wires.
Description : On meter length of wires carriers a constant current. The wire is bent to from a circular loop. The magnetic field at the centre of this loop is `B`.
Last Answer : On meter length of wires carriers a constant current. The wire is bent to from a circular loop. The magnetic field at ... B. `4B` C. `B/4` D. `16B`
Description : Three long, straight and parallel wires are arranged as shown in Fig. The forces experienced by 10 cm length of wire Q is
Last Answer : Three long, straight and parallel wires are arranged as shown in Fig. The forces experienced by 10 cm length ... D. `2.6xx10^(-4)`N towards the left
Description : Figure shows, three long straight wires parallel and equally speed with identical currents. Then, the force acting on each wire due to the other is
Last Answer : Figure shows, three long straight wires parallel and equally speed with identical currents. Then, the force acting on ... `F_(b) gt F_(a) gt F_(c)`
Description : i heard that flat speaker wires can carry more watts to the speakers, where online can i find some of this speaker wire?
Last Answer : They have audio outlets online through simple searching including Radioshack in which they offer very good prices.
Description : Nichrome wire is used as a heating element I many appliances because (a) it can be drawn out into wires easily (b) it has high resistivity (c) it resists oxidation in air when red hot (d) both (b) and (c) are correct
Description : Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Last Answer : (3) copper is a better conductor of electricity than iron Explanation: Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and low resistivity.
Description : __________ is an interface for connecting eight or more data wires. A. Serial Port B. Fire wire C. Parallel Port D. None of the Above
Last Answer : C. Parallel Port
Description : Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Last Answer : copper is a better conductor of electricity than iron
Description : A wire of length a units is cut into two equal pieces and make a circle of radius r with one piece. Frame the formula by making r the subject.
Last Answer : A wire of length a units is cut into two equal pieces and make a circle of radius r with one piece. Frame the formula by making r the subject.
Description : Weight of a person at a height of 2R from the centre of the earth, where R is the radius of the earth- (1) remains same (2) becomes half (3) becomes twice (4) becomes one-fourth
Last Answer : (4) becomes one-fourth Explanation: The gravitational force is proportional to 1/R2, where R is the distance from the centre of the Earth. So at a height of 2R from the centre of the earth, the corresponding weight would be one-fourth of the original weight.
Description : A sphere which has half the radius but twice the density of another sphere has: w) more mass x) less mass y) the same mass z) the same weight
Last Answer : ANSWER: X -- LESS MASS
Description : A wire is being used as a replacement having twice the length and one-half the cross-sectional area of the original wire. The resistance of this new wire, when compared to that of the original wire, ... B. twice as much C. the same as the original resistance D. one-half of the original resistance
Last Answer : Answer: A
Description : A replacement wire having twice the length and one-half the cross-sectional area of the original wire will have a resistance that is _____________. A. four times that of the original wire B. twice that of ... wire C. the same as that of the original wire D. one-half that of the original wire
Description : Assertion An `alpha-`particle and a deuteron having same kinetic energy enter in a uniform magnetic field perpendicular to the field. Then, radius of
Last Answer : Assertion An `alpha-`particle and a deuteron having same kinetic energy enter in a uniform magnetic ... If Assertion is false but Reason is true.
Description : An electron and a proton are moving at the same speed in circular paths in the same uniform magnetic field. The radius of the path of the proton is one of the following. Is this radius: w) the same ... of the electron y) a little larger than that of the electron z) smaller than that of the electron
Last Answer : ANSWER: X -- ABOUT 2000 TIMES LARGER THAN THAT OF THE ELECTRON