Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)

The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2 (t2 > t1). Obtain an expression for its mean-life. The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2 (t2 > t1). Obtain an expression for its mean-life. October [...]

Calculate the time taken to decay 100 percent of a radioactive sample in terms of (a) half-life T and (b) mean-life Tav. Calculate the time taken to decay 100 percent of a radioactive sample in terms fo (a) half-life T and (b) mean-life Tav. October 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

Two long parallel wires, AB and CD, carry equal currents in opposite directions. They lie in the x-y plane, parallel to the x-axis, and pass through the points (0,-a,0) and (0,a,0) respectively, Figure. The resultant magnetic field is: 0) and (0 0) respectively A) AB and CD and pass through the points (0 carry equal [...]

Figure shows cross section of two large parallel metal sheets carrying electric currents along their surface. The current in each sheet is 10/πA/m along the width, Consider two points A and B, as shown in the figure with their positions. as shown in the figure with their positions. Consider two points A and B Figure [...]

A radioactive sample has mass m, decay constant lemda, and molecular weight M. If the Avogadro number is NA, then A radioactive sample has mass m and molecular weight M. If the Avogadro number is NA decay constant lemda then October 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Two circular coil of radii 5 cm and 10 cm carry equal currents of 2 A. The coils have 50 and 100 turns, respectively, and are placed in such a way that their planes as well as their centers coincide. Magnitude of magnetic field at the common centre of coils is and are placed in [...]

The half-life of radon is 3.8 days. After how many days will only one-twentieth of radon sample be left over ? The half-life of radon is 3.8 days. After how many days will only one-twentieth of radon sample be left over ? October 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP [...]

Find the half-life of 238U if 1 g of it emits 1.24 * 10^4 alpha particles per second. Avogadro’s number = 6.023 * 10^23. Find the half-life of 238U if 1 g of it emits 1.24 * 10^4 alpha particles per second. Avogadro's number = 6.023 * 10^23. October 17, 2020 Category: Uncategorised (JEE Advanced [...]

Small amount of a radioactive substance (half-life = 10 days) is spread inside a room and consequently the level of radiation becomes 50 times the level for normal occupancy Small amount of a radioactive substance (half-life = 10 days) is spread inside a room and consequently the level of radiation becomes 50 times the level [...]

A long straight wire carries the current along +ve x direction . Consider four points in space A ( 0, 1 , 0 ) B (0, 1, 1 ) , C ( 1, 0 , 1 ), and D ( 1, 1 10 which of teh pairs will have the same magnitude magnetic field? 0 [...]