Physics question and answers for December 29, 2023
- Q Ick out the wrong statement In a simple battery circuit the A point of lowest potential is the negative terminal of the battery The resistance of an incandescent B lamp...
- Q A moving coil galvanometer is converted into an ammeter reading up to 0 03 A by connecting a shunt of resistance r 4 What is the maximum current which can...
- Q Consider a simple circuit shown in Fig variable resistance R R can vary from R to infinity ris internal resistance of the battery r R R Potential drop across AB...
- Q Charge Q flowing through a resistance R varies with time t as Q at bt Total heat produced in R is fRQ at bt Options a R 6b 1 2...
- Q The measurement of an unknown resistance R is to be carried out using Wheatstones bridge see Fig 3 25 of NCERT Book Two students perform an experiment in two ways...
- Q max Let there be n resistors R R with R max R R and R min R R Show that when they are connected in parallel the resultant resistance R...
- Q The resistance of a wire at room temperature 30 C is found to be 10 2 Now to increases the resistance by 10 the temperature of the wire must be...
- Q Suppose there is a circuit consisting of only resistances and batteries and we have to double or increase it to n times all voltages and all resistances Show that currents...
- Q Consider a current carrying wire current I in the shape of a circle Note that as the current progresses along the wire the direction of j current density changes in...
- Q The potential difference in open circuit for a cell is 2 2 V When a 42 resistor is connected between its two electrodes the potential difference becomes 2 V The...
- Q A cell has terminal voltage 2V in open circuit and internal resistance of the given cell is 202 If 4A of current is flowing between points P and Q in...
- Q N emf varies directly with the internal resistance as per the equation Ex 3 51 are connected as shown in the figure Assume that the length of the wire that...
- Q In copper each copper atom releases one electron If a current of 1 1 A is flowing in the copper wire of uniform cross sectional area of diameter 1 mm...
- Q 1cmx100cm If specific resistance of its material is 3 10 7 m then the resistance between the opposite rectangular faces is A 3 x 10702 3 10 C 3 x...
- Q An energy source will supply a constant current into the load if its internal resistance is A equal to the resistance of the load B C D very large as...
- Q When a copper voltmeter is connected with a battery of e m f 12 volt 2 gm of copper is deposited in 30 minutes If the same voltmeter is connected...
- Q Two batteries with e m f 12 V and 13 V are connected in parallel across a load resistor of 102 The internal resistances of the two batteries are and...
- Q 32 For a cell the graph between the potential difference V across the terminals of the cell and the current I drawn from the cell is shown in the figure...
- Q E internal resistance r 0 5 a storage A dc source OT battery of emf E 90 V and an external resistance R are connected as shown in figure For...
- Q Sir in this I have used formula of power v2 R but answer is according to the formula of power i2 R Please correct me sir where I am wrong...
- Q n identical cells are joined in series with its two cells A and B in the loop with reversed polarities EMF of each shell is E and internal resistance r...
- Q vii In silicon p n junction diode the width of depletion region ranges from a 0 5 mm to 1 nm c 50 pm to 100 m vili Water rises...
- Q Two batteries one of the emf 3V resistance 1 ohm and the other of emf 15 V internal resistance 2 ohm are connected in series with a resistance R as...
- Q The diagram below shows a circuit used in an experiment to determine the emf and internal resistance of the cell C A graph was plotted of the potential difference V...
- Q A 6 0 volt battery is connected to two light bulbs as shown in figure Light bulb 1 has resistance 3 ohm while light bulb 2 has resistance 6 ohm...
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