Physics question and answers for January 06, 2024
- Q A 1.2 nF parallel-plate capacitor has an air gap between its plates. Its capacitance increases by 3.0 nF when the gap is filled by a dielectric.What is the dielectric constant...
- Q 5 points Save Answe A parallel plate capacitor with a vacuum between the plates has a capacitance of 32.9 ?F. When the space between the plates is filled with some...
- Q The two plates of an empty (i.e. air-filled) parallel plate capacitor are connected to abattery. Sometime later, while the battery is still connected, a block of dielectric material (K=2is inserted...
- Q Consider an isolated capacitor with a dielectric slab between its plates. The two plates have charge Q and -Q. Because the capacitor is not hooked to anything, the charge on...
- Q Suppose you have two identical capacitors, each with a capacitance C. You want to use them to store as much energy as possible. What is the best way to wire...
- Q Potential difference of 100.0 V is applied across two capacitors in series, as shown. If C? is a 6 F capacitor and has a voltage drop of 75 V across...
- Q Five capacitors are connected to a 12V battery as shown, C?=2F, C?=4F, C3=1?F, C4=8?F, and C?= 3Fi) Determine the equivalent capacitance between points A and Bii) Determine the charge on...
- Q To measure the capacitance C of a capacitor, you attach the capacitorto a battery and wait until it is fully charged. You then disconnect thecapacitor from the battery and let...
- Q A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 3.90 ?C.What is the potential difference between the plates?
- Q For the capacitor network shown in (Figure 1), the potential difference across ab is 68 V.Find the total energy stored in the network.Find the energy stored in the 150 nF...
- Q A 5.00 pF, parallel-plate, air-filled capacitor with circular plates is to be used in a circuit in which it will be subjected to potentials of up to 1.00 x 102...
- Q A switch that connects a battery to a 20?F capacitor is closed. Several seconds later you find that the capacitor plates are charged to +30?C.What is the emf of the...
- Q A parallel-plate capacitor is formed from two 3.3 cm-diameter electrodes spaced 1.6 mm apart. The electric field strength inside the capacitor is 3.0 x 106 N/C. What is the magnitude...
- Q We want to use the Earth's magnetic field to apply a torque on a current loop. Suppose the Earth's magnetic field at this location is 5*10^(-5) Tesla (0.5 Gauss) and...
- Q A charge Q = -6.51 mC is initially on the right plate, shown on the right, which has a voltage of VRight = +38.2 V. The charge moves to the...
- Q A 4500 resistor is connected across a charged 0.750 nF capacitor. The initial current through the resistor, just after the connection is made, is measured to be 0.249 A.What magnitude...
- Q A 6.30 ?F capacitor that is initially uncharged is connected in series with a 4600 2 resistor and a 502 V emf source with negligible internal resistance.A long time after...
- Q A capacitor is connected to a power supply with a voltage of 25.0 V across the plates of the capacitor. When it is fully charged, the amount of charge on...
- Q The electrostatic energy of a flat capacitor with discoidal plates having a radius of 2 cm, spaced 0.1 mm apart, and charged with 1 nC, is equal to4.5 x 10^-9...
- Q Cell membranes (the walled enclosure around a cell) are typically about d= 7.7 nm thick. They are partially permeable to allow charged material to pass in and out, as needed....
- Q A capacitor consists of two 5.0-cm-diameter circular plates separated by 1.0 mm.The plates are charged to 160 V, then the battery is removed. (0 = 8.85 10^-12 C/N-m)Part A How...
- Q In the shown arrangement of the experiment of the metrebridge if AC corresponding to null deflection of galvanometer is x what would be its value if the radius of the...
- Q A wire of length 100 cm is connected to a cell of e m f 2 V and negligible internal resistance The resistance of the wire is 3 The additional...
- Q Potentiometer wire of length 1 m is connected in series with 490 resistance and 2 V battery If 0 2 mV cm is the potential gradient then resistance of the...
- Q A battery of e m f 2 V and internal resistance 22 is connected to an external resistance 8 2 If the length of the conductor is 4 m then...
- Q The resistance per unit length of a wire is 1 22 m A Leclanche cell of e m f 1 45 V is balanced against 2 9 m length of...
- Q A resistance of 990 2 and a cell of emf 2 V is connected in series with a potentiometer wire having a length 2 m and resistance 10 2 The...
- Q In a metrebridge experiment null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y If X Y then...
- Q 9 For the circuit shown in the figure the current through the inductor is 0 9 A while the current through the condenser is 0 4 A Hence current drawn...
- Q Two resistances are connected in the two gaps of a metrebridge The balance point is 20 cm from the zero end When a resistance of 15 Q2 is connected in...
- Q With resistances P and Q in the left and right gaps of a metrebridge the balance point divides the wire in the ratio 1 3 When P and Q are...
- Q Alternating Current In a step up transformer the Leclanche cell Emf 1 5 Volt is connected across primary The voltage developed in secondary would be
- Q A uniform wire of 16 Q2 is made into the form of a square Two opposite corners of the square are connected by a wire of resistance 16 2 The...
- Q metrebridge the gaps are closed by two resistances P and Q and the balance point is obtained at 40 cm When Q is shunted by a resistance of 10 2...
- Q In the circuit shown the current drawn from the battery is 4 A If 10 2 resistor is replaced by 20 2 resistor the current drawn from the circuit will...
- Q 4 The phase difference between source emf and curent is 0 A power transmission line feeds input power at 2300V to a step down transformer with its primary windings having...
- Q In a metrebridge when R and X are the resistances in left gap and right gap respectively the null point is obtained at 40 cm from the left Now when...
- Q 5 A conductor of area of cross section A having charge carriers each having a charge q is subjected to a potential V The number density of charge carriers in...
- Q 12 A homogeneous glass cone of half angle 30 is placed inverted on a disc so that its axis is vertical Radius of the disc is 4 0 cm and...
- Q 99 In the below circuit the battery E has an emf of 12 V and zero internal resistance While the battery E2 has an emf of 2 V 2 N...
- Q 105 In the given circuit the voltmeter records 5 V The resistance of the voltmeter in is V 1 VO VB 100 1 a 200 c 10 100 Q wwwww...
- Q e 33 It takes 16 min to boil some water in an electric kettle Due to some defect it becomes necessary to remove 10 turns of heating coil of the...
- Q 118 B B and B3 are the three identical bulbs connected to a battery of steady emf with key K closed What happens to the brightness of the bulbs B...
- Q Problem 4 In the figure below given two ideal generators and three resistors 1 12V 82 5V R 40 R 20 and R3 30 est fire R R3 un R...
- Q Four identical resistors each of resistance 2 Q are connected to battery of 20 V and internal resistance 2 92 as given below The reading of ideal ammeter A and...
- Q Two parallel conductors each of 0 50 m length separated by 5 0x10 m and carrying 3 0 A in opposite directions will experience what type and magnitude of mutual...
- Q 19 Three charges 4q Q and q are placed in a straight line of length 1 at points at distance 0 1 2 and I respectively What should be Q...
- Q 91 In the circuit given here the points A B and Care 70 V zero 10 V respectively Then 20 W AWWWWW 10 W D B www 1905 30 www...
- Q A hemispherical surface of radius R is placed with its cross section perpendicular to a uniform electric field as shown in figure The electric flux through the surface is ogtado...
- Q The emf E and the internal resistance r of the battery shown in figure are 4 3V and 1 002 respectively The external resistan ce R is 500 The resistance...
- Q The current i drawn from the 5 volt source will be 1 2 3 4 0 5 A 0 67A 0 17 A 0 33A Correct Answer 1 Status unattempted...
- Q The magnitude and direction of the current in the circuit shown will be 192 a d 3 e www 10 V 32 ww 7 A from a to b through...
- Q A set of n identical resistors each of resistance RN when connected in series have an effective resistance X and when the resistors are connected in parallel their effective resistance...
- Q The internal resistances of two cells shown are 0 1 2 and 0 3 22 If R 0 2 2 the potential difference across the A 2 V 0 192...
- Q When a resistance of 100 2 is connected in series with a galvanometer of resistance R then its range is V To double its range a resistance of 1000 is...
- Q Eels are able to generate current with biological cells called electroplaques The electroplaques in an eel are arranged in 100 rows each row stretching horizontally along the body of the...
- Q An electric network is is constructed with 12 and 2 2 resistors as shown The current through the 2 2 resistor nearest to the battery is A 1 5 A...
- Q The potentiometer wire of length 100cm has a resistance of 102 It is connected in series with a resistance of 52 and an accumulaot or emf 3V having negligible resistance...
- Q Find the effective value or rms value of an alternating current that changes according to the law All quantities are in S I unit and symbols have their usual meaning...
- Q is 8 4V when the current is 8A the A 12 4 V battery whose internal resistance is 0 05 2 is charged by an ideal external 14 2 V...
- Q Q7 II A bird stands on a dc electric transmission line carrying 3100 A Fig 25 34 The line has 2 5 X 105 resistance per meter and the bird...
- Q View In English A potential difference V is applied to a copper wire of diameter d and length L There will be no effect on the electron drift speed of...
- Q 5 In the given figure find the total resistance between the points A and B 60 2 A www 60 2 200 V B wwww 60 12 wwwwwwwwwww 30 2...
- Q In a series LCR circuit the frequencies f and f2 at which the 1 current falls to of the current amplitude at resonance 2 are separated by frequency interval A...
- Q Given that the current through 1202 resistance in the network shown is zero Then SRA 3 4 A The value of E is 42V C The resistance r is 302...
- Q 4 With a cell of emf 1 5 V the balance point is obtained at a distance of 60 cm from one end of a potentiometer wire Calculate the potential...
- Q Use of eddy currents is favoured in the following except Induction furnace Speedometer Electromagnetic damping Electric generator
- Q Q No 03 a You are given length of heating wire made of nickel chromium iron Alloy called Nichrome It has a resistance of 722 Under what circumstances the wire...
- Q The circuit shown has 5 resistors of equal resistance R Calculate equivalent resistance across points A and B A B Fun
- Q R 1 2 k R3 3 3 k 15V E E 5V VR R 2 2kQ
- Q 2 point A metre bridge is balanced with a 20 S2 resistance in the left gap and a 302 resistance in the right gap If 20 resistance is now shunted...
- Q Five equal resistances each of resistance R are connected a shown in figure A battery of Vvoltage is connected between points A and B The current flowing in AFCEB section...
- Q 3 3 A 25MVA 11kV generator has a X 0 2 pu Its negative and zero sequence reactances are 0 3pu and 0 1 pu respectively The neutral of the...
- Q 9 Consider a circuit as shown in figure Then choose CORRECT statement s 20 30 wwww 502 10V 492 69 A If 40 resistance is shorted resistance less wire connected...
- Q A current I flows through a cylindrical rod of uniform cross section area A and resistivity p The electric flux through the shaded cross section of rod as shown in...
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