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An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half-life 18 days inside the laboratory. Tests revealed that the radiation was 64 times
20
Oct
An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half-life 18 days inside the laboratory. Tests revealed that the radiation was 64 times An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half-life 18 days inside the laboratory. Tests [...]
A conducting ring of radius r and resistance R rolls on a horizontal surface with constant velocity v. The magnetic field B is uniform and is normal to the plane of the loop. Choose the correct option.
20
Oct
A conducting ring of radius r and resistance R rolls on a horizontal surface with constant velocity v. The magnetic field B is uniform and is normal to the plane of the loop. Choose the correct option. the current in wire AB is ( ab is one of the diameters ) The radius of the [...]
The figure given below is a plot of binding energy per nucleon, Eb, against the nuclear mass M; A, B, C, D, E, and F correspond to different nuclei. Consider four reactions:
20
Oct
The figure given below is a plot of binding energy per nucleon, Eb, against the nuclear mass M; A, B, C, D, E, and F correspond to different nuclei. Consider four reactions: -e against the nuclear mass M; A and F correspond to different nuclei. Consider four reactions: B C D Eb The figure given [...]
A conducting wire of length `l` and mass `m` is placed on two inclined rails as shown in figure. A current `I` is flowig in the wire in the direction shown When no magnetic field is present in the region, the wire is just on the verge of sliding. When a vertically upward magnetic field is switched on, the wire starts moving up the incline. The distance travelled by the wire as a function of time `t` will be
20
Oct
A conducting wire of length `l` and mass `m` is placed on two inclined rails as shown in figure. A current `I` is flowig in the wire in the direction shown When no magnetic field is present in the region, the wire is just on the verge of sliding. When a vertically upward magnetic field [...]
A neutron is scattered through ( deviation from its old direction) theta degree in an elastic collision with an initially stationary deutron. If the neutron loses 2/3 of its initial KE to the deutron
20
Oct
A neutron is scattered through ( deviation from its old direction) theta degree in an elastic collision with an initially stationary deutron. If the neutron loses 2/3 of its initial KE to the deutron A neutron is scattered through ( deviation from its old direction) theta degree in an elastic collision with an initially stationary [...]
A line charge λ per unit length is pasted uniformly on to the rim of a wheel of mass m and radius R. The wheel has light non-conducting spokes and is free to rotate about a vertical axis as shown in figure. A uniform magnetic field extends over a radial region of radius r given by B = −B 0 k ^ ( r≤a ; a<R ) = 0 (otherwise). What is the angular velocity of the wheel when this field is suddenly switched off ?
20
Oct
A line charge λ per unit length is pasted uniformly on to the rim of a wheel of mass m and radius R. The wheel has light non-conducting spokes and is free to rotate about a vertical axis as shown in figure. A uniform magnetic field extends over a radial region of radius r given [...]
A sample of 18F is used internally as a medical diagnostic tool to look for the effects of the positron decay (T1/2 = 110 min). How long (in hr) does it take for 99% of the 18F to decay?
20
Oct
A sample of 18F is used internally as a medical diagnostic tool to look for the effects of the positron decay (T1/2 = 110 min). How long (in hr) does it take for 99% of the 18F to decay? A sample of 18F is used internally as a medical diagnostic tool to look for the [...]
The magnetic flux density B is changing in magnitude at a constant rate dB/dt. A given mass m of copper, drawn into a wire of radius a and formed into a circular loop of radius r is placed perpendicular to the field B. The induced current in the loop is i. The resistivity of copper is ρ and density is d. The value of the induced current i is
20
Oct
The magnetic flux density B is changing in magnitude at a constant rate dB/dt. A given mass m of copper, drawn into a wire of radius a and formed into a circular loop of radius r is placed perpendicular to the field B. The induced current in the loop is i. The resistivity of copper [...]
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the current in wire AB is ( ab is one of the diameters ) ,
The magnetic flux density B is changing in magnitude at a constant rate dB/dt. A given mass m of copper ,
The radius of the circular conducting loop shown in figure is R. Magnetic field is decreasing at a constant rate alpha. Resistance per unit length of the loop is rho. Then ,
A rod of length `L` rotates in the form of a conical pendulum with an Angular velocity `omega ` about its axis as shown in Fig. 3.165. The rod makes an angle `theta` with the axis. The magnitude of the motional emf developed across the two emf of the rod is
20
Oct
A rod of length `L` rotates in the form of a conical pendulum with an Angular velocity `omega ` about its axis as shown in Fig. 3.165. The rod makes an angle `theta` with the axis. The magnitude of the motional emf developed across the two emf of the rod is the current in wire [...]
Nuclei X and Y convert into a stable nucleus Z. At t = 0 the number of nuclei of X is 8 times that of Y. Half life of X is 1 hour and half life of Y is 2 hour. Nucleus X is converted into Z by
20
Oct
Nuclei X and Y convert into a stable nucleus Z. At t = 0 the number of nuclei of X is 8 times that of Y. Half life of X is 1 hour and half life of Y is 2 hour. Nucleus X is converted into Z by Nuclei X and Y convert into a [...]