Answer:
<h2>65 kg</h2>
Explanation:
The mass of the person can be found by using the formula
p is the momentum
v is the velocity
From the question we have
We have the final answer as
<h3>65 kg</h3>
Hope this helps you
Answer:
The direction of magnetic field produced by a current carrying wire is given by the right hand thumb rule. If the thumb points in the direction of current the fingers curl along the direction of magnetic field.
further, The red end of the compass needle points in the direction of external magnetic field. As the red end of the needle is pointing away from us, the external magnetic field at its location should also be directed away from us. Using the right hand thumb rule, we can see that this is only possible if the current in the wire is flowing upwards.
Explanation:
Answer:
18 V
Explanation:
The 3Ω resistor and the 6Ω resistor are in parallel, so the voltage difference across them is equal.
V = IR
V = (2 A) (3 Ω)
V = 6 V
So the current going through the 6Ω resistor is:
V = IR
6 V = I (6 Ω)
I = 1 A
Therefore, the current going through the 4Ω resistor is the sum:
I = 2 A + 1 A
I = 3 A
The voltage drop across the 4Ω resistor is:
V = IR
V = (3 A) (4 Ω)
V = 12 V
So the total voltage difference between K and L is:
V = 6 V + 12 V
V = 18 V
Answer:
i) C decreases
ii) Q remains constant
iii) E remains constant
iv) ΔV increases
Explanation:
i)
We know, capacitance is given by:
<em>In this case as the distance between the plates increases the capacitance decreases while area and permittivity of free space remains constant.</em>
ii)
As the amount of charge has nothing to do with the plate separation in case of an open circuit hence the charge Q remains constant.
iii)
Electric field between the plates is given as:
where:
charge density,
<em>As we know that distance of plate separation cannot affect area of the plate. Charge Q and permittivity are also not affected by it, so E remains constant.</em>
iv)
- From the basic definition of voltage we know that it is the work done per unit charge to move it through a distance.
- Here we increase the distance so the work done per unit charge increases.