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A resistance of 4 Ω and a wire of length 5 meters and resistance 5 Ω are joined in series and connected to a cell of e.m.f. 10 V and internal resistance 1 Ω. A parallel combination of two identical cells is balanced across 300 cm of wire. The e.m.f. E of each cell is
20
Sep
A resistance of 4 Ω and a wire of length 5 meters and resistance 5 Ω are joined in series and connected to a cell of e.m.f. 10 V and internal resistance 1 Ω. A parallel combination of two identical cells is balanced across 300 cm of wire. The e.m.f. E of each cell is [...]
A rocket is fired vertically with a speed of 5 km s^-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth?
20
Sep
A rocket is fired vertically with a speed of 5 km s^-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth? A rocket is fired vertically with a speed of 5 km s^-1 from the earth's surface. How far from the earth does the rocket go [...]
The circuit shown here is used to compare the e.m.f. of the two cells E2 (E)1 > E2 . The null point is at C when the galvanometer is connected to E1. When the galvanometer is connected to E2, the null point will be
20
Sep
The circuit shown here is used to compare the e.m.f. of the two cells E2 (E)1 > E2 . The null point is at C when the galvanometer is connected to E1. When the galvanometer is connected to E2, the null point will be The circuit shown here is used to compare the e.m.f. of [...]
For comparing the e.m.f.’s of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment unsuccessful
20
Sep
For comparing the e.m.f.’s of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment unsuccessful a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment [...]
The weight of a body on the surface of earth is 63 N. what is the gravitational force on it due to the earth at a height equal to half the radius of earth ?
20
Sep
The weight of a body on the surface of earth is 63 N. what is the gravitational force on it due to the earth at a height equal to half the radius of earth ? The weight of a body on the surface of earth is 63 N. what is the gravitational force on it [...]
A cell of internal resistance 1.5 ohm and e.m.f. 1.5 volt balances 500 cm on a potentiometer wire. If a wire of 15 ohm is connected between the balance point and the cell, then the balance point will shift
20
Sep
A cell of internal resistance 1.5 ohm and e.m.f. 1.5 volt balances 500 cm on a potentiometer wire. If a wire of 15 ohm is connected between the balance point and the cell, then the balance point will shift A cell of internal resistance 1.5 ohm and e.m.f. 1.5 volt balances 500 cm on a [...]
A potentiometer is an ideal device of measuring potential difference because
20
Sep
A potentiometer is an ideal device of measuring potential difference because A potentiometer is an ideal device of measuring potential difference because September 20, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A battery of e.m.f. 10 V and internal resistance 2 Ω is connected in primary circuit with a uniform potentiometer wire and a rheostat whose resistance is fixed at 998 Ω.A battery of unknown e.m.f. is being balanced on this potentiometer wire and balancing length is found to be 50 cm.When area of cross section of potentiometer wire is doubled, then balancing length is found to be 75 cm. (i) Calculate e.m.f. of the battery. (ii) Calculate resistivity of potentiometer wire if length of wire is 100 cm and area of cross-section (initially) is 100 cm^2.
20
Sep
A battery of e.m.f. 10 V and internal resistance 2 Ω is connected in primary circuit with a uniform potentiometer wire and a rheostat whose resistance is fixed at 998 Ω.A battery of unknown e.m.f. is being balanced on this potentiometer wire and balancing length is found to be 50 cm.When area of cross section [...]
While doing an experiment with potentiometer Fig. it was found that the deflection is one sided and (i)the deflection decreased while moving from one end A of the wire to the end B, (ii) the deflection increased, while the jockey was moved towards the end B. (a) Which terminal + or −ve of the cell E1, is connected at X ub case (i) and how is E1 is related to E ? (b) Which terminal of the cell E1 is connected at X in case (ii) ?
20
Sep
While doing an experiment with potentiometer Fig. it was found that the deflection is one sided and (i)the deflection decreased while moving from one end A of the wire to the end B, (ii) the deflection increased, while the jockey was moved towards the end B. (a) Which terminal + or −ve of the cell [...]
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(ii) the deflection increased ,
is connected at X ub case (i) and how is E1 is related to E ? (b) Which terminal of the cell E1 is connected at X in case (ii) ? ,
While doing an experiment with potentiometer Fig. it was found that the deflection is one sided and (i)the deflection decreased while moving from one end A of the wire to the end B ,
while the jockey was moved towards the end B. (a) Which terminal + or −ve of the cell E1 ,
AB is a poitentiometer wire see figure. If the value of R is increased, in which direction will the balance point J shift?
20
Sep
AB is a poitentiometer wire see figure. If the value of R is increased, in which direction will the balance point J shift? AB is a poitentiometer wire see figure. If the value of R is increased in which direction will the balance point J shift? September 20, 2020 Category: Uncategorised (JEE Advanced Physics by [...]