Physics question and answers for December 25, 2023
- Q For a cell the graph between the potential difference V across the terminals of the cell and the current 1 drawn from the cell is shown in figure The emf...
- Q to ac age of ta de F d R 25 92 L 1 5 H C 45 F 6 An inductor of reactance 1 22 and a resistor of 2...
- Q In a gas discharge tube if 1 25 10 6 electron are flowing per sec from left to right and 1 25 10 6 protons are flowing per sec from...
- Q Two batteries in opposition are joined as shown The internal resistance of 6 V battery is 2 22 and 4 V battery is 82 The potential difference between the points...
- Q 12 An alternating voltage of angular frequency is circuit an induced in electric consisting of inductance L and capacitance C connected in parallel Then across the inductance coil 1 a...
- Q 32 A 1 5 F capacitor is charged of 60 V The charging battery is then disconnected and a 15 mH is connected in series with the capacitor so tha...
- Q 70 The self inductance of a choke coil is 10 mH When it is connected with a 10 V dc source then the loss of power is 20 watt When...
- Q Consider the circuit shown below I is constant current source meaning that no matter what device is connected between points A and B the current provided by the constant current...
- Q 15 15 What is the equivalent resistance of the three resistors on the left to the 6 V cell in the above fic 1 10 2 2 99 3 592...
- Q 3 An LCR series ac circuit is at resonance with 10 V each across L C and R If the resistance is halved the respective voltages across L C and...
- Q Twelve wires each of resistance 10 0 are joined to form a cube and an ideal battery of emf 30 V is also connected In series with one of resistance...
- Q The diffusion current in p n junction is From n side to p side From p side to n side hr min From n type to p side if junction...
- Q 1 An ammeter and a milliammeter are converted from identical galvanometers Which one has smaller resistance 1 Ammeter 2 Milliammeter 3 Both have equal resistances 4 The resistance of ammeter...
- Q 16 Two identical capacitors have the same capacitance C One of them is charged to potential V and other to V The negative end is joined with the positive end...
- Q In a meter bridge the null point is found at a distance of 25 cm from A If now a resistance of 10 2 is connected in parallel with S...
- Q In the following R C circuit the capacitor is in the steady state The initial separation of the capacitor plates is t 0 the separation between the plates starts changing...
- Q Assuming that the two diodes D and D used in the electric circuit shown in the figure are ideal find out the value of the current flowing through 122 resistor...
- Q 6 For the arrangement of the potentiometer shown in the figure the balance point is obtained at a distance 75 cm from A when the key k is open A...
- Q nected across the terminals of a cell the Q When a resistance is current is I When the resistance is changed to R the current is I2 The internal resistance...
- Q You have 20 identical cells When these are connected in series with resistance R current through circuit is I Now your naughty friend reverse some of the cell then current...
- Q n e 29 A potentiometer is an ideal device off measuring potential difference because 1 It uses a sensitive galvanometer 2 It does not take current from the potential difference...
- Q The diffusion current in p n junction is O From n side to p side From p side to n side From n type to p side if junction is...
- Q 27 The figure shows a circuit diagram of a Wheatstone Bridge to measure the resistance G of the galvanometer The relation will be satisfied only when ww PR QG 1...
- Q 15 To measure a potential difference across a resistor of resistance R a voltmeter of resistance R is used To measure the potential with a minimum accuracy of 95 then...
- Q D The charge on condenser will reduce to one third 4 A capacitor of capacity C is connected with a battery of potential V in parallel The distance between its...
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