Answer:
Explanation:
Given
Diameter of Plates is D
distance between Plates is d
Energy Stored in the Plates is U
Suppose fixed Potential is V
Energy is given by

where C=capacitance

where A=area of Plates

Thus 
Keeping all other factors as same

For triple the Energy

divide 1 and 2 we get


Thus the diameter should be change to
times of original value
Speed is the speed that object is moving on while velocity is the direction and movement speed you can make it but velocity no
Answer:
1.0639 A
Explanation:
We have given rms voltage V = 44 volt
Resistance = 60 ohm
According to ohm's law 
So 
this is the rms current but we have to find the maximum current
So maximum current 
Momentum (symbol p) and the equation of momentum is:
p = m*v
When south poles of the two magnets are brought close together, they will repel.
Thus, the statement is true.
The strength of an electromagnet can be increased by increasing the number of turns on the wire of the coil.
Thus, the second statement is false.