Physics question and answers for December 28, 2023
- Q Infinite number of internal resistance E 9657 2 2 n n connected in series in same manner across an E r E n n E r 39 3 n nr...
- Q Answer given is 2 15 A capacitor of capacitance C is initially charged to a potential difference of V Now it is connected to a battery of 2V with opposite...
- Q B In India electricity is supplied for domestic use at 220 V It is supplied at 110 V in USA If the resistance of a 60 W bulb for use...
- Q the value of the five band Resister using color code table The nominal value is The tolerance is The Max value is The Min value is Yellow brey Black Black...
- Q 10 Refer to the figure given below use it to find the equivalent resistance across the points a b If a potential difference of 12 V is applied across the...
- Q The value of the resistance R in figure is adjusted such that power dissipated in the 2 2 resistor is maximum Then the power dissipated in the 2 will be...
- Q 8 In the circuit shown there are n repetitions of the same loop What resistance Ro should be connected across the end points so that the equivalent resistance between a...
- Q 6 A potentiometer wire has length 4 m and resistance 8 22 The resistance that must be connected in series with the wire and an accumulator of e m f...
- Q In a RLC series circuit shown the readings of voltmeters V and V are 100 V and 120 V respectively If source voltage is 130 V a Voltage across resistor...
- Q A balanced star connected load has an impedance of 6 3j per phase The line voltage is Vab 11020 Find a The phase voltages b The phase currents C The...
- Q a V depends on I non linearly b the relation between Vand I depends on the sign of V for the same v absolute value of V c The relation...
- Q A source of voltage V is connected to a resistance R and two ideal inductors L1 and L2 through a switch S as shown There is no mutual inductance b...
- Q An electrical dipole of moment p is placed in an electric field of intensity E The dipole acquires a position such that the axis of the dipole makes an angle...
- Q 14 Two resistances are connected in two gaps of metre bridge The balance point is 20 cm from the zero end A resistance of 15 22 is connected in series...
- Q The figure shows the network of resistances connected across the cell of unknown emf E Mark the correct statement s gut each of I g qua Mfg 692 502 A...
- Q The value of time constant for the electric circuit shown in the figure is r is the internal resistance of the cell of emf E E 2V A B www...
- Q The potential at the terminals of the battery falls from 9V on open circuit to 6 volts when a resistor of 100 is connected across its terminals What is the...
- Q The electromotive force of a standard cell is measured with a potentiometer that gives reading of 1 3562 V When a 1 MQ resistor is connected across the standard cell...
- Q TU The current in an AC circuit is given by sin 50m t where t is in second The time interva in which it will reach from zero to its...
- Q In the circuit shown in figure capacitor was initially uncharged switch is closed at t 0 Select correct alternatives 1 2 MS 48V 600 k Correct wwww The initial battery...
- Q Find the voltage cross and current through R1 in the circuit shown below using Superposition Theorem V1 XC1 j40 HE C1 16Vrms 200Hz 0 3 0 R1 XC2 j40 C2...
- Q 14 At time t 0 a battery of 10 V is connected across points A and B shown in figure If the capacitors have no change initially at what time...
- Q The values of two resistors are R 6 0 3 k and R 10 0 2 k The percentage error in the equivalent resistance when they are connected in parallel...
- Q D For different values of resistance R power consumptions in R are given Then which of the following values are not possible a 2 W c 8 W 1 Only...
- Q Q 64 In the circuit shown in figure a the emf of the ideal cell is E 100 V and resistance R is 10 2 The current I Voltage V...
- Q 37 All the bulbs shown in the figure are identical and are rated to fuse if the voltage across the bulb exceeds 200V The bulb s which will fuse in...
- Q 7 Write the relation between relative permeability and magnetic susceptibility Section C Each Question carries 2 marks 10 1 A galvanometer of resistance 100 gives a full scale deflection for...
- Q Sir please explain why emf decrease with time and why ternal resistance increase with time 21 Assertion EMF of battery decreases with time AIIMS 2016 Reason Internal resistance increases with...
- Q Four circuits are shown below All the batteries have the same voltage Vand all resistors have the same resistance R In which circuit does the battery delivers the most power...
- Q 6 In a series resonant LCR circuit the voltage across R is 100 V and R 1k2 with C 2uF The resonant frequency w is 200 rad s At resonance...
- Q Two cells each of e m f E and internal resistance r are connected in parallel across a resistor R The power dissipated in the resistor is maximum if 1...
- Q Write a matrix equation that determines the loop currents 1228 29 V 36 V 852 392 4 2 5021 10 V 592 692 13 292 20 V C For each...
- Q Two wires of same material and same length are connected to two gaps of a meter bridge The balancing length measured from left gap is 25 cm The ratio of...
- Q Four wires of the same diameter are connected in turn between two points maintained at a constant potential difference Their resistivities and lengths are respectively p and L wire 1...
- Q You are provided with 48 cells each of emf 2 volts and internal resistance 4 ohms What maximum current can flow in the circuit having an external resistance of 12...
- Q A resistance coil wired to an external battery is placed inside a thermally insulated cylinder fitted with a frictionless piston and containing an ideal gas A current I 240 mA...
- Q 26 Four cells each of emf E and internal r are connected in series If polarity of one cell is reversed then the terminal voltage across this cell is E...
- Q For the circuit shown in the adjacent figure select the correct statements from the following A B B 20 www www B ww 20 Fund www B a x and...
- Q ons on it is Q 25 Using a long extension cord in which each conductor has a resistance 8Q a bulb marked on olas 100 W 200 V is connected...
- Q A 18 V battery with internal resistance 0 5 is connected across a variable resistance R The value of R for which the power delivered to it is maximum is...
- Q Two heating coils A and B are used to heat water When coil A is supplied a constant voltage V it heats 1 kg water from 20 C to 60...
- Q In the given figure point B and C are earthed potential difference between point A and B is 10V 1 4V 3 9V www 192 B C 521092 1532 D...
- Q A nichrome wire of uniform cross sectional area is bent to form a ractangular loop ABCD Another nichrome wire of the same cross sectional is connected to from the diagonal...
- Q 3 What will be respectively the potential and electric field in the above set up if the consecutive charges have opposite sign 9 1 65 E 2 3 9 62...
- Q cells in series but one 4 A person connects four cell has its terminals reversed The external resistance is 192 If each cell has an e m f of 1...
- Q EXERCISE Find equivalent resistance between A and B R A WW Be KR www KR www k R www k R www Fig 25 58 HINT Let RB x then...
- Q In the given diagram choose correct options The value of I is 4A The current from the cell is 4A Voltage drop across AB is 140 V The current from...
- Q A part of a larger circuit is shown in the figure Both batteries shown have internal resistance 10 each If the points A and B are equipotential and a current...
- Q 2 Two charged balls of the same radius and weight suspended on threads of equal length are immersed into a liquid having density of d and a dielectric constant K...
- Q A group of 12 resistors is arranged along the edges of a cube as shown in the diagram The vertices of the cube are labeled a h The resistance between...
- Q 39 A small ball having charge q is suspended from a weightless inextensible string It is placed in a region of uniform electric field E 3 10 N C as...
- Q The heating coil of an electric heater should be made with material which has A low specific resistance and low melting point B high specific resistance and low melting point...
- Q 1 In the shown circuit when the voltage between A and B is 16 V the voltage betwe C and D is 8 V When the voltage between and D...
- Q 32 A pendulum bob of mass 30 mg carrying a ch of 20 10 C is at rest in a uniform horize electric field of 20000 N C The tension...
- Q Two capacitors C 1 F and C2 2 F are initially charged to potential difference of 100 V and 20 V respectively and then joined as shown in figure Find...
- Q SECI PHY SEC II ww R PHY SEC III CHEM SEC I C HH m In the AC circuit shown in figure the capacitance of the capacitor is chosen in...
- Q Q 1 54 A part of a larger circuit is shown in the figure Both batteries shown have internal resistance 12 each If the points A and B are equipotential...
- Q THE AD If current through 402 is 2A then calcu potential difference across A B www 202 1 8V 402 www ww 2 16 V 2A www 202 3 4...
- Q The total momentum of electrons in a straight wire 3 of copper of length 1 metre carrying a current of 16 A is 1 91 x 10 2 kg m...
- Q Two cylindrical resistors one of length radius r and the other of length 3 and ra 3r are made of the same materials It resistance of the smaller one is...
- Q Consider a circuit made of a wire with uniform resistance in a shape of a circle as shown in the picture The circle is connected diagonally from point C to...
- Q Voltmeter of resistance 102 and ammeter of resistance 100 are attached in the following circuit with switches S and S ww R 1052 150V Column I switch position 1 II...
- Q 3 9K A cuboid shaped metal structure has following specifications as shown in figure 3cm Icm 2cm The structure is connected to a battery acros opposing faces The resistance shall...
- Q D Two metallic spheres of radii a and b are placed away from each other and are connected by a thin conducting wire A charge Q is given to one...
- Q A constant electric current I is passed through a straight conductor of length C If S is specific charge of electron then the total momentum of electrons is 1 IS...
- Q PERDADERNO LONGE GY 182 45 In the shown circuit find the total current through the battery in amperes 302 www www 602 7 50 P 1 IA 2 2 A...
- Q 3 A potentiometer wire is 100 cm long and a constant potential difference is maintained across it Two cells are connected in series first to support one another and then...
- Q Queation No 19 If a ideal wire is connected between two points then potential difference between that two points Zero Non zero May be zero may not zero None
- Q An electric box contains three e m f sourd as shown in the figure Given 26 26 volt r r r 192 61 LJ 1 e m f of the...
- Q the effective resistance across A and B in the given circuit A 1 52 3 15 2 1092 20 23 wwwww 20 22 392 www 1052 www 223752 www 1092...
- Q In the part of a circuit shown in Fig potential difference V V between p G and H will be www 4015 2A 3V 20 ww 10 5V 1 0...
- Q Problem 3 57 A heater is designed to operate with a power of 1000 watt in a 100 V line It is connected in combination with a resistance of 102...
- Q The resistances P Q R and S in the bridge shown are adjusted such that the deflection in the galvanometer G is zero when both the keys K and K...
- Q A potential difference of V volts is applied on two parallel electrodes separated by a distance of 4 0 x 10 2 m The electrons of very low energy are...
- Q For the values of R1 608 R2 608 R3 896 Vs 30 If the real diode offset voltage 0 7V were conducting then the value of voltage source VB should...
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