1. The answer is false. The size of the force will decrease since by Coulomb's law the electric force between 2 charges is inversely proportional to the square of the distance between them.
2. The answer is true. This is true since gas flows from a region of higher pressure to a region of lower pressure.
no of moles n = PV/RT
here both are at same pressure, temperature ans volume
so they have same no of moles
therefore Both have same no of particles
since they have same no of moles
molecular weight of argon > molecular weight helium
mass of argon > mass of helium
since they have same volume
density = mass/volume
density of argon > desity of helium
3. The answer is false. This is false as the purpose of the ground plug is to complete the circuit path for high potential charges.
I assume that seperation is 1.3 centimeters
The potential difference between two vertical slots is,
V = Ed
Here, d is separation between two vertical slots.
Solve for E
E = V / d
E = 120 / 1.3 cm
E = 120 / 1.3*10^-2 m
E = 9200 V/m
4. The answer is false. False as by the mechanism of radiation also heat can be transferred between 2 objects.
1 calorie/gram °C = 4.186 joule/gram °C
The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius
calorie = 4.18 Joule
specific heat of water is 4.186 kJ/kgC
200 mL = 0.1 kg
energy = 4.186 kJ/kgC x 0.1 kg x 60ºC = 25.1 kJ
energy = 4.186 kJ/kgC x 0.1 kg x 60ºC = 25.1 kJ
power = energy per unit time
100 J/s = 25.1 kJ / t
t = 251 seconds
5. The answer is false. False as the kinetic energy of an object depends on velocity and not on position.
kinetic energy K = 1/2 mv2
since speed is constant , the kinetic enrgy is also constant
answer : equal to one half of the mass times the linear speed's square
1. Since,
Pv = nRT,
Vf = V/3,
then
Pf = 3P.
So pressure increases by 3 times.
2. Since
V = IR,
Current in 10 ohm will be 3/2 times that in 15 ohm.
Voltage across both resistances will be same.
3. Frequency of second from small bowl will be more than that from large bowl.
4. No both will have different.
Copper is diamagnetic material so it is weakly magnetize in opposite direction to applied field. So when external field is removed bar B has large magnetic field in direction of applied field but bar A has weak field in opposite direction.
four magnetic quadrupoles
two smaller bar magnets,i.e., two magnetic dipoles, each with a north pole and asouth pole
two isolatedmagnetic monopoles, a single north pole and a single southpole
two isolatedelectric charges, a positive charge and a negativecharge
This is atrick question because a magnetic dipole cannot be cut in half.
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